Vim Documentation: options



*options.txt*   For Vim version 5.4.  Last change: 1999 Jul 23


                  VIM REFERENCE MANUAL    by Bram Moolenaar



Options                                                 *options*

1. Setting options                       |set-option|
2. Automatically setting options |auto-setting|
3. Saving settings                      |save-settings|
4. Options summary                      |option-summary|

For an overview of options see help.txt |option-list|.

Vim has a number of internal variables and switches which can be set to
achieve special effects.  These options come in three forms:

        boolean          can only be on or off           *boolean* *toggle*
        number          has a numeric value
        string          has a string value

==============================================================================

1. Setting options                                       *set-option*


                                                        *:se* *:set*
:se[t]                  Show all options that differ from their default value.

:se[t] all              Show all but terminal options.

:se[t] termcap          Show all terminal options.  Note that in the GUI the
                        key codes are not show, because they are generated
                        interally and can't be changed.  Changing the terminal
                        codes in the GUI is not useful either...

:se[t] {option}?        Show value of {option}.

:se[t] {option}         Toggle option: set, switch it on.
                        Number option: show value.
                        String option: show value.

:se[t] no{option}       Toggle option: Reset, switch it off.

:se[t] {option}!   or
:se[t] inv{option}      Toggle option: Invert value. {not in Vi}

:se[t] {option}&    Reset option to its default value. {not in Vi}

:se[t] all&         Set all options, except terminal options, to their
                        default value.  The values of 'term', 'lines' and
                        'columns' are not changed. {not in Vi}

:se[t] {option}={value}         or
:se[t] {option}:{value}
                        Set string or number option to {value}.

                                                                *:set-args*
                        For numeric options the value can be given in decimal,
                        hex (preceded with 0x) or octal (preceded with '0')
                        (hex and octal are only available for machines which
                        have the strtol() function).
                        The old value can be inserted by typing 'wildchar' (by
                        default this is a <Tab> or CTRL-E if 'compatible' is
                        set).  See |cmdline-completion|.
                        White space between {option} and '=' is allowed and
                        will be ignored.  White space between '=' and {value}
                        is not allowed.
                        See |option-backslash| for using white space and
                        backslashes in {value}.


:se[t] {option}+={value}                                *:set+=*
                        Add the {value} to a number option, or concatenate the
                        {value} to a string option.  When the option is a
                        comma separated list, a comma is added, unless the
                        value was empty.  There is no check for doubled
                        values.  You can avoid this by removing a value first.
                        Example:
 set guioptions-=T guioptions+=T
                        Also see |:set-args| above.


:se[t] {option}^={value}                                *:set^=*
                        Multiply the {value} to a number option, or
                        prepend the {value} to a string option.  When the
                        option is a comma separated list, a comma is added,
                        unless the value was empty.
                        Also see |:set-args| above.


:se[t] {option}-={value}                                *:set-=*
                        Subtract the {value} from a number option, or remove
                        the {value} from a string option, if it is there.
                        If the {value} is not found in a string option, there
                        is no error or warning.  When the option is a comma
                        separated list, a comma is deleted, unless the option
                        becomes empty.
                        Also see |:set-args| above.


:bro[wse] se[t]                 *:set-browse* *:browse-set* *:opt* *:options*
:opt[ions]              Open a window for viewing and setting all options.
                        Options are grouped by function.
                        Offers short help for each option.  Hit <CR> on the
                        short help to open a help window with more help for
                        the option.
                        Modify the value of the option and hit <CR> on the
                        "set" line to set the new value.  For window and
                        buffer specific options, the last accessed window is
                        used to set the option value in, unless this is a help
                        window, in which case the window below help window is
                        used (skipping the option-window).
                        {not available when compiled without the |+eval| or
                        |+autocmd| features}

The {option} arguments to ":set" may be repeated.  For example:
 :set ai nosi sw=3 ts=3
If you make an error in one of the arguments, an error message will be given
and the following arguments will be ignored.

For {option} the form "t_xx" may be used to set a termcap option.  This will
override the value from the termcap.  You can then use it in a mapping.  If
the "xx" part contains special characters, use the <t_xx> form:
        :set <t_#4>=^[Ot

The listing from ":set" looks different from Vi.  Long string options are put
at the end of the list.  The number of options is quite large.  The output of
"set all" probably does not fit on the screen, causing Vim to give the
|more-prompt|.


                                                        *option-backslash*
To include white space in a string option value it has to be preceded with a
backslash.  To include a backslash you have to use two.  Effectively this
means that the number of backslashes in an option value is halved (rounded
down).
A few examples:
 :set tags=tags\ /usr/tags results in "tags /usr/tags"
 :set tags=tags\\,file results in "tags\,file"
 :set tags=tags\\\ file results in "tags\ file"

For MS-DOS and WIN32 backslashes in file names are mostly not removed.  More
precise: For options that expect a file name (those where environment
variables are expanded) a backslash before a normal file name character is not
removed.  But a backslash before a special character (space, backslash, comma,
etc.) is used like explained above.


                                *add-option-flags* *remove-option-flags*
Some options are a list of flags.  When you want to add a flag to such an
option, without changing the existing ones, you can do it like this:
 :set guioptions+=a
Remove a flag from an option like this:
 :set guioptions-=a
This removes the 'a' flag from 'guioptions'.


                           *:set_env* *expand-env* *expand-environment-var*
Environment variables in most string options will be expanded.  If the
environment variable exists the '$' and the following environment variable
name is replaced with its value.  If it does not exist the '$' and the name
are not modified.  Any non-id character (not a letter, digit or '_') may
follow the environment variable name.  That character and what follows is
appended to the value of the environment variable.  Examples:
 :set term=$TERM.new
 :set path=/usr/$INCLUDE,$HOME/include,.


                                                                *$HOME*
Using "~" is like using "$HOME", but it is only recognized at the start of an
option and after a space or comma.

On Unix systems "~user" can be used too.  It is replaced by the home directory
of user "user".  Example:
 :set path=~mool/include,/usr/include,.

On Unix systems the form "${HOME}" can be used too.  The name between {} can
contain non-id characters then.  Note that if you want to use this for the
"gf" command, you need to add the '{' and '}' characters to 'isfname'.


                                                                *$VIM*
The environment variable "$VIM" is used to locate various user files for Vim,
such as the user startup script ".vimrc".  This depends on the system, see
|startup|.

To avoid the need for every user to set the $VIM environment variable, Vim
will try to get the value for $VIM in this order:
1. The value defined by the $VIM environment variable.  You can use this to
   make Vim look in a specific directory for its support files.  Example:
 setenv VIM /home/paul/vim
2. The path from 'helpfile' is used, unless it contains some environment
   variable too (the default is "$VIMRUNTIME/doc/help.txt": chicken-egg
   problem).  The file name ("help.txt" or any other) is removed.  Then
   trailing directory names are removed, in this order: "doc", "runtime" and
   "vim{version}" (e.g., "vim54").
3. For MSDOS, Win32 and OS/2 Vim tries to use the directory name of the
   executable.  If it ends in "/src", this is removed.  This is useful if you
   unpacked the .zip file in some directory, and adjusted the search path to
   find the vim executable.  Trailing directory names are removed, in this
   order: "runtime" and "vim{version}" (e.g., "vim54").
4. For Unix the compile-time defined installation directory is used (see the
   output of ":version").

Once Vim has done this once, it will set the $VIM environment variable.  To
change it later, use a ":let" command like this:
 let $VIM = "/home/paul/vim/"


                                                                *$VIMRUNTIME*
The environment variable "$VIMRUNTIME" is used to locate various support
files, such as the on-line documentation and files used for syntax
highlighting.  For example, the main help file is normally
"$VIMRUNTIME/doc/help.txt".
You don't normally set $VIMRUNTIME youself, but let Vim figure it out.  This
is the order used to find the value of $VIMRUNTIME:
1. If the environment variable $VIMRUNTIME is set, it is used.  You can use
   this when the runtime files are in an unusual location.
2. If "$VIM/vim{version}" exists, it is used.  {version} is the version
   number of Vim, without any '-' or '.'.  For example: "$VIM/vim54".  This is
   the normal value for $VIMRUNTIME.
3. If "$VIM/runtime" exists, it is used.
4. The value of $VIM is used.  This is for backwards compatibility with older
   versions.
5. When the 'helpfile' option is set and doesn't contain a '$', its value is
   used, with "doc/help.txt" removed from the end.

For Unix, when there is a compiled-in default for $VIMRUNTIME (check the
output of ":version"), steps 2, 3 and 4 are skipped, and the compiled-in
default is used after step 5.  This means that the compiled-in default
overrules the value of $VIM.  This is useful if $VIM is "/etc" and the runtime
files are in "/user/share/vim/vim54".

Once Vim has done this once, it will set the $VIMRUNTIME environment variable.
To change it later, use a ":let" command like this:
 let $VIMRUNTIME = "/home/piet/vim/vim54"


Note the maximum length of an expanded option is limited.  How much depends on
the system, mostly it is something like 256 or 1024 characters.


                                                        *:fix* *:fixdel*
:fix[del]               Set the value of 't_kD':
 't_kb' is 't_kD' becomes 
                                  CTRL-?        CTRL-H
                                not CTRL-?      CTRL-?

                        (CTRL-? is 0177 octal, 0x7f hex) {not in Vi}

                        If your delete key terminal code is wrong, but the
                        code for backspace is alright, you can put this in
                        your .vimrc:
 :fixdel
                        This works no matter what the actual code for
                        backspace is.

                        If the backspace key terminal code is wrong you can
                        use this:
 :if &term == "termname"
 : set t_kb=^V<BS>
 : fixdel
 :endif
                        Where "^V" is CTRL-V and "<BS>" is the backspace key
                        (don't type four characters!).  Replace "termname"
                        with your terminal name.

                        If your <Delete> key sends a strange key sequence (not
                        CTRL-? or CTRL-H) you cannot use ":fixdel".  Then use:
 :if &term == "termname"
 : set t_kD=^V<Delete>
 :endif
                        Where "^V" is CTRL-V and "<Delete>" is the delete key
                        (don't type eight characters!).  Replace "termname"
                        with your terminal name.

                        Note about Linux: By default the backspace key
                        produces CTRL-?, which is wrong.  You can fix it by
                        putting this line in your rc.local:
 echo "keycode 14 = BackSpace" | loadkeys

==============================================================================

2. Automatically setting options                 *auto-setting*

Besides changing options with the ":set" command, there are three alternatives
to set options automatically for one or more files:

1. When starting Vim initializations are read from various places.  See
   |initialization|.  Most of them are performed for all editing sessions,
   and some of them depend on the directory where Vim is started.
2. If you start editing a new file, the automatic commands are executed.
   This can be used to set options for files matching a particular pattern and
   many other things.  See |autocommand|.
3. If you start editing a new file, and the 'modeline' option is on, a
   number of lines at the beginning and end of the file are checked for
   modelines.  This is explained here.


                                                *modeline* *vim:* *vi:* *ex:*
There are two forms of modelines.  The first form:
        [text]{white}{vi:|vim:|ex:}[white]{options}

[text]          any text or empty
{white}         at least one white space (<Space> or <Tab>)
{vi:|vim:|ex:}  the string "vi:", "vim:" or "ex:"
[white]         optional white space
{options}       a list of option settings, separated with white space or ':',
                where each part between ':' is the argument for a ":set"
                command

Example:
 vi:noai:sw=3 ts=6

The second form (this is compatible with some versions of Vi):

        [text]{white}{vi:|vim:|ex:}[white]set {options}:[text]

[text]          any text or empty
{white}         at least one white space (<Space> or <Tab>)
{vi:|vim:|ex:}  the string "vi:", "vim:" or "ex:"
[white]         optional white space
set             the string "set " (note the space)
{options}       a list of options, separated with white space, which is the
                argument for a ":set" command
:               a colon
[text]          any text or empty

Example:
 /* vim: set ai tw=75: */

The white space before {vi:|vim:|ex:} is required.  This minimizes the chance
that a normal word like "lex:" is caught.  There is one exception: "vi:" and
"vim:" can also be at the start of the line (for compatibility with version
3.0).  Using "ex:" at the start of the line will be ignored (this could be
short for "example:").

The number of lines that are checked can be set with the 'modelines' option.
If 'modeline' is off or 'modelines' is 0 no lines are checked.

Note that for the first form all of the rest of the line is used, thus a line
like:
 /* vi:ts=4: */
will give an error message for the trailing "*/".  This line is OK:
 /* vi:set ts=4: */

If an error is detected the rest of the line is skipped.

If you want to include a ':' in a set command precede it with a '\'.  No other
commands than "set" are supported, for security reasons (somebody might create
a Trojan horse text file with modelines).

==============================================================================

3. Saving settings                                      *save-settings*


                                                        *:mk* *:mkexrc*
:mk[exrc] [file]        Write current key mappings and changed options to
                        [file] (default ".exrc" in the current directory),
                        unless it already exists.  {not in Vi}

:mk[exrc]! [file]       Always write current key mappings and changed
                        options to [file] (default ".exrc" in the current
                        directory).  {not in Vi}


                                                        *:mkv* *:mkvimrc*
:mkv[imrc][!] [file]    Like as :mkexrc, but default is ".vimrc" in the
                        current directory.  The ":version" command is also
                        written to the file.  {not in Vi}


                                                        *:mks* *:mksession*
:mks[ession][!] [file]  Like :mkvimrc, but write commands to the end of the
                        file that reload the files being edited at the time of
                        the command.  |session-file|
                        The created file can be loaded with a |:source|
                        command to recreate the current edit session.
                        {not in Vi} {only when compiled with the +mksession
                        feature enabled}

These commands will write ":map" and ":set" commands to a file, in such a way
that when these commands are executed, the current key mappings and options
will be set to the same values.  The options 'columns', 'endofline', 'lines',
'modified', 'scroll', 'term' and 'ttyfast' are not included, because these are
terminal or file dependent.  Note that the options 'binary', 'fileformat',
'paste' and 'readonly' are included, this might not always be what you want.

When special keys are used in mappings, The 'cpoptions' option will be
temporarily made empty, to avoid the mappings to be misinterpreted.  This
makes the file incompatible with Vi, but makes sure it can be used with
different terminals.

A common method is to use a default ".vimrc" file, make some modifications
with ":map" and ":set" commands and write the modified file.  First read the
default ".vimrc" in with a command like ":source ~piet/.vimrc.Cprogs", change
the settings and then save them in the current directory with ":mkvimrc!".  If
you want to make this file your default .vimrc, move it to your home directory
(on Unix), s: (Amiga) or $VIM directory (MS-DOS).  You could also use
autocommands |autocommand| and/or modelines |modeline|.

If you only want to add a single option setting to your vimrc, you can use
these steps:
1. Edit your vimrc file with Vim.
2. Play with the option until it's right.  E.g., try out different values for
   'guifont'.
3. Append a line to set the value of the option, using the expression register
   '=' to enter the value.  E.g., for the 'guifont' option:
 o:set guifont=<C-R>=&guifont<CR><Esc>
   [<C-R> is a CTRL-R, <CR> is a return, <Esc> is the escape key]

Note that when you create a .vimrc file, this can influence the 'compatible'
option, which has several side effects.  See |'compatible'|.
":mkvimrc", ":mkexrc" and ":mksession" write the command to set or reset the
'compatible' option to the output file first, because of these side effects.


                                                    *session-file*
You can use session files to quickly switch between different projects,
automatically loading the files you were last working on in that project.
Session files are a nice addition to viminfo-files, which are used to remember
information for all sessions together |viminfo-file|.

The output of ":mksession" is like ":mkvimrc", but additional commands are
added to the file.  Which ones depends on the 'sessionoptions' option.  The
resulting file, when executed with a ":source" command:
1. Restores mappings and options, if 'sessionoptions' contains "options".
2. Restores global variables that start with an uppercase letter and contain
   at least one lowercase letter, if 'sessionoptions' contains "globals".
3. Unloads all currently loaded buffers.
4. Restores the working directory.
5. Restores GUI vim window position, if 'sessionoptions' contains "winpos".
6. Restores screen height, if 'sessionoptions' contains "resize".
7. Reloads the files you were editing, at the lines where you left them.  If
   'sessionoptions' contains "buffers" then all buffers are restored,
   including hidden and unloaded buffers.  Otherwise only buffers in windows
   are restored.
8. Restores windows, if 'sessionoptions' contains "winsize".
   If the Vim window size has been restored or is already the same as in the
   loaded session, the window sizes are restored exactly.  Otherwise, the
   windows are just given sensible sizes
9. If a file exists with the same name as the session file, but ending in
   "x.vim" (for eXtra), executes that as well.  You can use *x.vim files to
   specify additional settings and actions associated with a given session,
   such as creating menu items in the GUI version.

The full filename of your current session is available in the internal
variable "this_session".  See |this_session-variable|.

So an example mapping might be (all one line):
 :nmap <S-F1> :wa | execute("mksession " . this_session)<CR>:so $VIM/sessions/
which saves the files and session, and starts off the command to load another.

==============================================================================

4. Options summary                                      *option-summary*

In the list below all the options are mentioned with their full name and with
an abbreviation if there is one.  Both forms may be used.

In this document when a boolean option is "set" that means that ":set option"
is entered.  When an option is "reset", ":set nooption" is used.

For some options there are two default values: The "Vim default", which is
used when 'compatible' is not set, and the "Vi default", which is used when
'compatible' is set.

Most options are the same in all windows and buffers.  There are a few that
are specific to how the text is presented in a window.  These can be set to a
different value in each window.  For example the 'list' option can be set in
one window and reset in another for the same text, giving both types of view
at the same time.  There are a few options that are specific to a certain
file.  These can have a different value for each file or buffer.  For example
the 'textwidth' option can be 78 for a normal text file and 0 for a C
program.

        global                  one option for all buffers and windows
        local to window         each window has its own copy of this option
        local to buffer         each buffer has its own copy of this option

When creating a new window the option values from the currently active window
are used as a default value for the window-specific options.  For the
buffer-specific options this depends on the 's' and 'S' flags in the
'cpoptions' option.  If 's' in included (which is the default) the values for
buffer options are copied from the currently active buffer when a buffer is
first entered.  If 'S' is present the options are copied each time the buffer
is entered, this is almost like having global options.  If 's' and 'S' are not
present, the options are copied from the currently active buffer when the
buffer is created.

A jump table for the options with a short description can be found at |X_op|.


                                        *'aleph'* *'al'*
'aleph' 'al'         number  (default 128 for MS-DOS, 224 otherwise)
                        global
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        The ASCII code for the first letter of the Hebrew alphabet.  The
        routine that maps the keyboard in Hebrew mode, both in Insert mode
        (when hkmap is set) and on the command-line (when hitting CTRL-_)
        outputs the Hebrew characters in the range [aleph..aleph+26].
        aleph=128 applies to PC code, and aleph=224 applies to ISO 8859-8.
        See |rightleft.txt|.


                        *'allowrevins'* *'ari'* *'noallowrevins'* *'noari'*
'allowrevins' 'ari'   boolean  (default off)
                        global
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        Allow CTRL-_ in Insert and Command-line mode.  This is default off, to
        avoid that users that accidentally type CTRL-_ instead of SHIFT-_ get
        into reverse Insert mode, and don't know how to get out.  See
        'revins'.  This option is reset when 'compatible' is set.


                         *'altkeymap'* *'akm'* *'noaltkeymap'* *'noakm'*
'altkeymap' 'akm'       boolean (default off)
                        global
                        {not in Vi}
                        {only available when compiled with the |+farsi|
                        feature}
        When on, the second language is Farsi. In editing mode CTRL-_ toggles
        the keyboard map between Farsi and English, when 'allowrevins' set.

        When off, the keyboard map toggles between Hebrew and English. This
        is useful to start the vim in native mode i.e. English (left-to-right
        mode) and have default second language Farsi or Hebrew (right-to-left
        mode).  See |farsi.txt|.


                        *'autoindent'* *'ai'* *'noautoindent'* *'noai'*
'autoindent' 'ai'       boolean  (default off)
                        local to buffer
        Copy indent from current line when starting a new line (typing <CR>
        in Insert mode or when using the "o" or "O" command).  If you do not
        type anything on the new line except <BS> and then type <Esc> or
        <CR>, the indent is deleted again.  When autoindent is on,
        formatting (with the "gq" command or when you reach 'textwidth' in
        Insert mode) uses the indentation of the first line.   When
        'smartindent' or 'cindent' is on the indent is changed in specific
        cases.  The 'autoindent' option is reset when the 'paste' option is
        set.  {small difference from Vi: After the indent is deleted when
        typing <Esc> or <CR>, the cursor position when moving up or down is
        after the deleted indent; Vi puts the cursor somewhere in the deleted
        indent}.


                                 *'autowrite'* *'aw'* *'noautowrite'* *'noaw'*
'autowrite' 'aw' boolean  (default off)
                        global
        Write the contents of the file, if it has been modified, on each
        :next, :rewind, :previous, :stop, :suspend, :tag, :!, :make, CTRL-]
        and CTRL-^ command; and when a CTRL-O, CTRL-I, '{A-Z0-9}, or `{A-Z0-9}
        command takes one to another file.


                                                        *'background'* *'bg'*
'background' 'bg'       string  (default "dark" or "light")
                        global
                        {not in Vi}
        When set to "dark", Vim will try to use colors that look good on a
        dark background.  When set to "light", Vim will try to use colors that
        look good on a light background.  Any other value is illegal.
        Vim tries to set the default value according to the terminal used.
        This will not always be correct.
        When starting the GUI, the default value for 'background' will be
        "light".  When the value is not set in the .gvimrc, and Vim detects
        that the background is actually quite dark, 'background' is set to
        "dark".  But this happens only AFTER the .gvimrc file has been read
        (because the window needs to be opened to find the actual background
        color).  To get around this, force the GUI window to be opened by
        putting a ":gui" command in the .gvimrc file, before where the value
        of 'background' is used (e.g., before ":syntax on").
        For the Win32 GUI, setting 'background' before starting the GUI, will
        change the background and foreground colors to lightgrey on black or
        black on white.  On other systems setting 'background' does not
        change the foreground or background colors.
        Normally this option would be set in the .vimrc file.  Possibly
        depending on the terminal name.  Example:
 if &term == "pcterm"
 set background=dark
 endif
        When this option is set, the default settings for the highlight groups
        will change.  To use other settings, place ":highlight" commands AFTER
        the setting of the 'background' option.
        This option is also used in the "$VIMRUNTIME/syntax/syntax.vim" file
        to select the colors for syntax highlighting.  After changing this
        option, you must load syntax.vim again to see the result.  This can be
        done with ":syntax on".


                                                        *'backspace'* *'bs'*
'backspace' 'bs' number  (default 0)
                        global
                        {not in Vi}
        Influences the working of <BS>, <Del>, CTRL-W and CTRL-U in Insert
        mode:
 value effect 
          0     Vi compatible backspacing is used.
          1     allow backspacing over <EOL>s and autoindent.
          2     allow backspacing over the start of insert.  CTRL-W and CTRL-U
                stop once at the start of insert.
        See |:fixdel| if your <BS> or <Del> key does not do what you want.


                                *'backup'* *'bk'* *'nobackup'* *'nobk'*
'backup' 'bk'               boolean  (default off)
                        global
                        {not in Vi}
        Make a backup before overwriting a file.  Leave it around after the
        file has been successfully written.  If you do not want to keep the
        backup file, but you do want a backup while the file is being
        written, reset this option and set the 'writebackup' option (this is
        the default).  If you do not want a backup file at all reset both
        options (use this if your file system is almost full).  See the
        |backup-table| for more explanations.


                                                *'backupdir'* *'bdir'*
'backupdir' 'bdir'     string  (default for Amiga: ".,t:",
                                 for MS-DOS and Win32: ".,c:/tmp,c:/temp"
                                 for Unix: ".,~/tmp,~/")
                        global
                        {not in Vi}
        List of directories for the backup file, separated with commas.
        - The backup file will be created in the first directory in the list
          where this is possible.
        - Empty means that no backup file will be created ('patchmode' is
          impossible!).
        - A directory "." means to put the backup file in the same directory
          as the edited file.
        - A directory starting with "./" (or ".\" for MS-DOS et.al.) means to
          put the backup file relative to where the edited file is.  The
          leading "." is replaced with the path name of the edited file.
        - Spaces after the comma are ignored, other spaces are considered part
          of the directory name.  To have a space at the start of a directory
          name, precede it with a backslash.
        - To include a comma in a directory name precede it with a backslash.
        - A directory name may end in an '/'.
        - Environment variables are expanded |:set_env|.
        - Careful with '\' characters, type one before a space, type two to
          get one in the option (see |option-backslash|), for example:
 :set bdir=c:\\tmp,\ dir\\,with\\,commas,\\\ dir\ with\ spaces
        - For backwards compatibility with Vim version 3.0 a '>' at the start
          of the option is removed.
        See also 'backup' and 'writebackup' options.
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.


                                                *'backupext'* *'bex'*
'backupext' 'bex'       string  (default "~", for VMS: "_")
                        global
                        {not in Vi}
        String which is appended to a file name to make the name of the
        backup file.  The default is quite unusual, because this avoids
        accidentally overwriting existing files with a backup file.  You might
        prefer using ".bak", but make sure that you don't have files with
        ".bak" that you want to keep.


                                     *'binary'* *'bin'* *'nobinary'* *'nobin'*
'binary' 'bin'             boolean  (default off)
                        local to buffer
                        {not in Vi}
        This option should be set before editing a binary file.  You can also
        use the "-b" Vim argument.  When this option is switched on a few
        options will be changed (also when it already was on):
                'textwidth'  will be set to 0
                'wrapmargin' will be set to 0
                'modeline'   will be off
                'expandtab'  will be off
        Also, 'fileformat' and 'fileformats' options will not be used, the
        file is read and written like 'fileformat' was "unix" (a single <NL>
        separates lines).
        NOTE: When you start editing a(nother) file while the 'bin' option is
        on, settings from autocommands may change the settings again (e.g.,
        'textwidth'), causing trouble when editing.  You might want to set
        'bin' again when the file has been loaded.
        The previous values of these options are remembered and restored when
        'bin' is switched from on to off.  Each buffer has its own set of
        saved option values.
        When writing a file the <EOL> for the last line is only written if
        there was one in the original file (normally Vim appends an <EOL> to
        the last line if there is none; this would make the file longer).  See
        the 'endofline' option.


                        *'bioskey'* *'biosk'* *'nobioskey'* *'nobiosk'*
'bioskey' 'biosk'       boolean  (default on)
                        global
                        {not in Vi}  {only for MS-DOS}
        When on the bios is called to obtain a keyboard character.  This works
        better to detect CTRL-C, but only works for the console.  When using a
        terminal over a serial port reset this option.
        Also see |'conskey'|.


                                                *'breakat'* *'brk'*
'breakat' 'brk'           string  (default " ^I!@*-+_;:,./?")
                        global
                        {not in Vi}
                        {not available when compiled without the  |+linebreak|
                        feature}
        This option lets you choose which characters might cause a line
        break if 'linebreak' is on.


                                                *'browsedir'* *'bsdir'*
'browsedir' 'bsdir'   string  (default for "last")
                        global
                        {not in Vi} {only for Motif and Win32 GUI}
        Which directory to use for the file browser:
           last         Use same directory as with last file browser.
           buffer       Use the directory of the related buffer.
           current      Use the current directory.


                                   *'cindent'* *'cin'* *'nocindent'* *'nocin'*
'cindent' 'cin'           boolean  (default off)
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the |+cindent|
                        feature}
        Enables automatic C program indenting  See 'cinkeys' to set the keys
        that trigger reindenting in insert mode and 'cinoptions' to set your
        preferred indent style.  If 'lisp' is not on and 'equalprg' is empty,
        the "=" operator indents using this algorithm rather than calling an
        external program.  See |C-indenting|.  This option is switched off
        when 'paste' is set.  When you don't like the way 'cindent' works, try
        the 'smartindent' option.

'cinkeys' 'cink'   string  (default "0{,0},:,0#,!^F,o,O,e")
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the |+cindent|
                        feature}
        A list of keys that, when typed in Insert mode, cause reindenting of
        the current line.  Only happens if 'cindent' is on.  See
        |C-indenting|.


                                                *'cinoptions'* *'cino'*
'cinoptions' 'cino'   string  (default "")
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the |+cindent|
                        feature}
        The 'cinoptions' affect the way 'cindent' reindents lines in a C
        program.  See |cinoptions-values| for the values of this option, and
        |C-indenting| for info on C indenting in general.



                                                *'cinwords'* *'cinw'*
'cinwords' 'cinw'       string  (default "if,else,while,do,for,switch")
                        local to buffer
                        {not in Vi}
                        {not available when compiled without both the
                        |+cindent| and the |+smartindent| features}
        These keywords start an extra indent in the next line when
        'smartindent' or 'cindent' is set.  For 'cindent' this is only done at
        an appropriate place (inside {}).


                                                *'clipboard'* *'cb'*
'clipboard' 'cb' string  (default "")
                        global
                        {not in Vi}
                        {only in GUI versions or when the |+xterm_clipboard|
                        feature is included}
        This option is a list of comma separated names.
        These names are recognized:

        unnamed         When included, Vim will use the clipboard register '*'
                        for all yank, delete and put operations which would
                        normally go to the unnamed register.  When a register
                        is explictly specified, it will always be used
                        regardless of whether "unnamed" is in 'clipboard' or
                        not.  The clipboard register can always be explicitly
                        accessed using the "* notation.  Also see
                        |gui-clipboard|.

        autoselect      Works like the 'a' flag in 'guioptions': If present,
                        then whenever Visual mode is started, or the Visual
                        area extended, Vim tries to become the owner of the
                        windowing system's global selection or put the
                        selected text on the clipboard.  See |guioptions_a|
                        for details.  When the GUI is active, the 'a' flag in
                        'guioptions' is used, when the GUI is not active, this
                        "autoselect" flag is used.


                                                *'cmdheight'* *'ch'*
'cmdheight' 'ch' number  (default 1)
                        global
                        {not in Vi}
        Number of screen lines to use for the command-line.  Helps avoiding
        |hit-return| prompts.


                                                *'columns'* *'co'*
'columns' 'co'             number  (default 80 or terminal width)
                        global
                        {not in Vi}
        Number of columns of the screen.  Normally this is set by the terminal
        initialization and does not have to be set by hand.


                                                *'comments'* *'com'*
'comments' 'com' string  (default
                                "s1:/*,mb:*,ex:*/,://,b:#,:%,:XCOMM,n:>,fb:-")
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the |+comments|
                        feature}
        A comma separated list of strings that can start a comment line.  See
        |format-comments|.  See |option-backslash| about using backslashes to
        insert a space.


                        *'compatible'* *'cp'* *'nocompatible'* *'nocp'*
'compatible' 'cp'       boolean  (default on, off when a .vimrc file is found)
                        global
                        {not in Vi}
        This option has the function of making Vim either more Vi-compatible,
        or behave in a more useful way.  This is a special kind of option,
        because when it's set or reset, other options are also changed as a
        side effect.  CAREFUL: Setting or resetting this option can have a lot
        of unexpected effects: Mappings are interpreted in another way, undo
        behaves differently, etc.
        By default this option is on and the Vi defaults are used for the
        options.  This default was chosen for those people who want to use Vim
        just like Vi, and don't even (want to) know about the 'compatible'
        option.
        When a ".vimrc" file is found while Vim is starting up, this option is
        switched off, and all options that have not been modified will be set
        to the Vim defaults.  Effectively, this means that when a ".vimrc"
        file exists, Vim will use the Vim defaults, otherwise it will use the
        Vi defaults.  (Note: This doesn't happen for the system-wide vimrc
        file).  Also see |compatible-default|.
        You can also set this option with the "-C" argument, and reset it with
        "-N".  See |-C| and |-N|.
        Switching this option off makes the Vim defaults be used for options
        that have a different Vi and Vim default value.  See the options
        marked with a '+' below.  Other options are not modified.
        At the moment this option is set, several other options will be set
        or reset to make Vim as Vi-compatible as possible.  See the table
        below.  This can be used if you want to revert to Vi compatible
        editing.
        See also 'cpoptions'.

 option + set value effect 

        'allowrevins'        off           no CTRL-_ command
        'backspace'    0             normal backspace
        'backup'          off           no backup file
        'cindent'        off           no C code indentation
        'cpoptions'  + (all flags)   Vi-compatible flags
        'digraph'        off           no digraphs
        'esckeys'      + off           no <Esc>-keys in Insert mode
        'expandtab'    off           tabs not expanded to spaces
        'fileformats'      + ""          no automatic file format detection,
                          "dos,unix"  except for DOS, Windows and OS/2
        'formatoptions'  + "vt"                Vi compatible formatting
        'gdefault'      off           no default 'g' flag for ":s"
        'history'      + 0             no commandline history
        'hlsearch'      off           no highlighting of search matches
        'incsearch'    off           no incremental searching
        'insertmode'          off           do not start in Insert mode
        'iskeyword'  + "@,48-57,_" keywords contain alphanumeric
                                                characters and '_'
        'joinspaces'          on            insert 2 spaces after period
        'modeline'    + off           no modelines
        'more'            + off           no pauses in listings
        'revins'          off           no reverse insert
        'ruler'            off           no ruler
        'scrolljump'          1             no jump scroll
        'scrolloff'    0             no scroll offset
        'shiftround'          off           indent not rounded to shiftwidth
        'showcmd'      + off           command characters not shown
        'showmode'    + off           current mode not shown
        'smartcase'    off           no automatic ignore case switch
        'smartindent'        off           no smart indentation
        'smarttab'      off           no smart tab size
        'softtabstop'        0             tabs are always 'tabstop' positions
        'startofline'        on            goto startofline with some commands
        'tagrelative'      + off           tag file names are not relative
        'textauto'    + off           no automatic textmode detection
        'textwidth'    0             no automatic line wrap
        'tildeop'        off           tilde is not an operator
        'ttimeout'      off           no terminal timeout
        'whichwrap'  + ""          left-right movements don't wrap
        'wildchar'    + CTRL-E       only when the current value is <Tab>
                                        use CTRL-E for cmdline completion


                                                *'complete'* *'cpt'*
'complete' 'cpt' string  (default: ".,w,b,u,t,i")
                        global
                        {not in Vi}
        This option specifies how keyword completion |ins-completion| works
        when CTRL-P or CTRL-N are used.  It indicates the type of completion
        and the places to scan.  It is a comma separated list of flags:
        .       scan the current buffer ('wrapscan' is ignored)
        w   scan buffers from other windows
        b   scan other loaded buffers
        u     scan the unloaded buffers
        k   scan the files given with the 'dictionary' option
        k[dict] scan the file [dict].  Several "k" flags can be given,
                patterns are valid too.  For example:
 :set cpt=k/usr/dict/*,k~/spanish
        i   scan current and included files
        d   scan current and included files for defined name or macro
                |i_CTRL-X_CTRL-D|
        ]       tag completion
        t       same as "]"

        Unloaded buffers are not loaded, thus their autocmds |:autocmd| are
        not executed, this may lead to unexpected completions from some files
        (gzipped files for example)

        The default is ".,w,b,u,t,i", which means to scan:
           1. the current buffer
           2. buffers in other windows
           3. other loaded buffers
           4. unloaded buffers
           5. tags
           6. included files

        As you can see, CTRL-N and CTRL-P can be used to do any 'iskeyword'-
        based expansion (eg dictionary |i_CTRL-X_CTRL-K|, included patterns
        |i_CTRL-X_CTRL-I|, tags |i_CTRL-X_CTRL-]| and normal expansions)


                                *'confirm'* *'cf'* *'noconfirm'* *'nocf'*
'confirm' 'cf'             boolean (default off)
                        global
                        {not in Vi}
        When 'confirm' is on, certain operations that would normally
        fail because of unsaved changes to a buffer, e.g. ":q" and ":e",
        instead raise a |dialog| asking if you wish to save the current
        file(s).  You can still use a ! to unconditionally |abandon| a buffer.
        If 'confirm' is off you can still activate confirmation for one
        command only (this is most useful in mappings) with the |:confirm|
        command.
        Also see the |confirm()| function and the 'v' flag in 'guioptions'.


                        *'conskey'* *'consk'* *'noconskey'* *'noconsk'*
'conskey' 'consk'       boolean  (default off)
                        global
                        {not in Vi}  {only for MS-DOS}
        When on direct console I/O is used to obtain a keyboard character.
        This should work in most cases.  Also see |'bioskey'|.  Together,
        three methods of console input are available:
        'conskey'   'bioskey'     action
           on        on or off      direct console input
           off          on          BIOS
           off          off         STDIN


                                                *'cpoptions'* *'cpo'*
'cpoptions' 'cpo'       string  (Vim default: "aABceFs",
                                 Vi default:  all flags)
                        global
                        {not in Vi}
        A sequence of single character flags.  When a character is present
        this indicates vi-compatible behavior.  This is used for things where
        not being vi-compatible is mostly or sometimes preferred.
        'cpoptions' stands for 'compatibleoptions'.
        Commas can be added for readability.
        To avoid problems with flags that are added in the future, use the
        "+=" and "-=" feature of ":set" |add-option-flags|.

 contains behaviour 
                a       When included, a ":read" command with a file name
                        argument will set the alternate file name for the
                        current window.
                A       When included, a ":write" command with a file name
                        argument will set the alternate file name for the
                        current window.
                b   "\|" in a ":map" command is recognized as the end of
                        the map command.  The '\' is included in the mapping,
                        the text after the '|' is interpreted as the next
                        command.  Use a CTRL-V instead of a backslash to
                        include the '|' in the mapping.  Applies to all
                        mapping, abbreviation, menu and autocmd commands.
                        See also |map_bar|.
                B   A backslash has no special meaning in mappings,
                        abbreviations and the "to" part of the menu commands.
                        Remove this flag to be able to use a backslash like a
                        CTRL-V.  For example, the command ":map X \<Esc>"
                        results in X being mapped to:
                                'B' included:       "\^["    (^[ is a real <Esc>)
                                'B' excluded:   "<Esc>"  (5 characters)
                                ('<' excluded in both cases)
                <    Disable the recognition of special key codes in |<>|
                        form in mappings, abbreviations, and the "to" part of
                        menu commands.  For example, the command
                        ":map X <Tab>" results in X being mapped to:
                                '<' included:   "<Tab>"  (5 characters)
                                '<' excluded:   "^I"     (^I is a real <Tab>)
                        Also see the 'k' flag below.
                c   Searching continues at the end of any match at the
                        cursor position.  When not present searching continues
                        one character from the cursor position.  With 'c'
                        "abababababab" only gets three matches when repeating
                        "/abab", without 'c' there are five matches.
                d   Using "./" in the 'tags' option doesn't mean to use
                        the tags file relative to the current file, but the
                        tags file in the current directory.
                e   When executing a register with ":@r", always add a
                        <CR> to the last line, also when the register is not
                        linewise.  If this flag is not present, the register
                        is not linewise and the last line does not end in a
                        <CR>, then the last line is put on the command-line
                        and can be edited before hitting <CR>.
                E   It is an error when using "y", "d", "c", "g~", "gu" or
                        "gU" on an Empty region.  The operators only work when
                        at least one character is to be operate on.  Example:
                        This makes "y0" fail in the first column.
                f   When included, a ":read" command with a file name
                        argument will set the file name for the current buffer,
                        if the current buffer doesn't have a file name yet.
                F   When included, a ":write" command with a file name
                        argument will set the file name for the current
                        buffer, if the current buffer doesn't have a file name
                        yet.
                j   When joining lines, only add two spaces after a '.',
                        not after '!' or '?'.  Also see 'joinspaces'.
                J   A |sentence| has to be followed by two spaces after
                        the '.', '!' or '?'. A <Tab> is not recognized as
                        white space.
                k   Disable the recognition of raw key codes in
                        mappings, abbreviations, and the "to" part of menu
                        commands.  For example, if <Key> sends ^[OA (where ^[
                        is <Esc>), the command ":map X ^[OA" results in X
                        being mapped to:
                                'k' included:   "^[OA"   (3 characters)
                                'k' excluded:   "<Key>"  (one key code)
                        Also see the '<' flag above.
                K  Don't wait for a key code to complete when it is
                        halfway a mapping.  This breaks mapping <F1><F1> when
                        only part of the second <F1> has been read.  It
                        enables cancelling the mapping by typing <F1><Esc>.
                l   Backslash in a [] range in a search pattern is taken
                        literally, only "\]" is special  See |/[]|
                           'l' included: "/[ \t]"  finds <Space>, '\' and 't'
                           'l' excluded: "/[ \t]"  finds <Space> and <Tab>
                L   When the 'list' option is set, 'wrapmargin',
                        'textwidth' and Virtual replace mode (see |gR|) count
                        a <Tab> as two characters, instead of the normal
                        behavior of a <Tab>.
                m   When included, a showmatch will always wait half a
                        second.  When not included, a showmatch will wait half
                        a second or until a character is typed.  |'showmatch'|
                o   Line offset to search command is not remembered for
                        next search.
                O   Don't complain if a file is being overwritten, even
                        when it didn't exist when editing it.  This is a
                        protection agains a file unexpectedly created by
                        someone else.  Vi didn't complain about this.
                p   Vi compatible Lisp indenting.  When not present, a
                        slightly better algorithm is used.
                r   Redo ("." command) uses "/" to repeat a search
                        command, instead of the actually used search string.
                s   Set buffer options when entering the buffer for the
                        first time.  This is like it is in Vim version 3.0.
                        And it is the default.  If not present the options are
                        set when the buffer is created.
                S   Set buffer options always when entering a buffer
                        (except 'readonly', 'fileformat', 'filetype' and
                        'syntax').  This is the (most) Vi compatible setting.
                        The options are set to the values in the current
                        buffer.  When you change an option and go to another
                        buffer, the value is copied.  Effectively makes the
                        buffer options global to all buffers.

                        's'    'S'     copy buffer options
                        no     no      when buffer created
                        yes    no      when buffer first entered (default)
                         X     yes     each time when buffer entered (vi comp.)

                t       Search pattern for the tag command is remembered for
                        "n" command.  Otherwise Vim only puts the pattern in
                        the history for search pattern, but doesn't change the
                        last used search pattern.
                u       Undo is Vi compatible.  See |undo-two-ways|.
                w   When using "cw" on a blank character, only change one
                        character and not all blanks until the start of the
                        next word.
                W   Don't overwrite a readonly file.  When omitted, ":w!"
                        overwrites a readonly file, if possible.
                x   <Esc> on the command-line executes the command-line.
                        The default in Vim is to abandon the command-line,
                        because <Esc> normally aborts a command.  |c_<Esc>|
                y   A yank command can be redone with ".".
                $       When making a change to one line, don't redisplay the
                        line, but put a '$' at the end of the changed text.
                        The changed text will be overwritten when you type the
                        new text.  The line is redisplayed if you type any
                        command that moves the cursor from the insertion
                        point.
                !       When redoing a filter command, use the last used
                        external command, whatever it was.  Otherwise the last
                        used -filter- command is used.
                *   Use ":*" in the same way as ":@".  When not included,
                        ":*" is an alias for ":'<,'>", select the Visual area.
                %   Vi-compatible matching is done for the "%" command.
                        Does not recognize "#if", "#endif", etc.
                        Does not recognize "/*" and "*/".
                        Parens inside single and double quotes are also
                        counted, causing a string that contains a paren to
                        disturb the matching.  For example, in a line like
                        "if (strcmp("foo(", s))" the first paren does not
                        match the last one.  When this flag is not included,
                        parens inside single and double quotes are treated
                        specially.  When matching a paren outside of quotes,
                        everything inside quotes is ignored.  When matching a
                        paren inside quotes, it will find the matching one (if
                        there is one).  This works very well for C programs.


                                                *'cscopeprg'* *'csprg'*
'cscopeprg' 'csprg'   string  (default "cscope")
                        global
                        {not available when compiled without the |+cscope|
                        feature}
                        {not in Vi}
        Specifies the command to execute cscope.  See |cscopeprg|.
        When this option is set from a |modeline|, while the 'secure' option
        is set, you will get a warning message.


                                *'cscopetag'* *'cst'* *'nocscopetag'* *'nocst'*
'cscopetag' 'cst'       boolean (default off)
                        global
                        {not available when compiled without the |+cscope|
                        feature}
                        {not in Vi}
        Use cscope for tag commands.  See |cscope-options|.


                                                *'cscopetagorder'* *'csto'*
'cscopetagorder' 'csto'   number  (default 0)
                        global
                        {not available when compiled without the |+cscope|
                        feature}
                        {not in Vi}
        Determines the order in which ":cstag" performs a search.  See
        |cscopetagorder|.


                                        *'cscopeverbose'* *'csverb'*

                                        *'nocscopeverbose'* *'nocsverb'*
'cscopeverbose' 'csverb' boolean (default off)
                        global
                        {not available when compiled without the |+cscope|
                        feature}
                        {not in Vi}
        Give messages when adding a cscope database.  See |cscopeverbose|.


                                                *'define'* *'def'*
'define' 'def'             string  (default "^#\s*define")
                        global
                        {not in Vi}
        Pattern to be used to find a macro definition.  It is a search
        pattern, just like for the "/" command.  This option is used for the
        commands like "[i" and "[d" |include-search|.  The 'isident' option is
        used to recognize the identifier name after the match.  See
        |option-backslash| about inserting backslashes to include a space or
        backslash.
        The default value is for C programs.  For C++ this value would be
        useful, to include const type declarations:
 ^\(#\s*define\|[a-z]*\s*const\s*[a-z]*\)
        When using the ":set" command, you need to double the backslashes!


                                                *'dictionary'* *'dict'*
'dictionary' 'dict'   string  (default "")
                        global
                        {not in Vi}
        List of file names, separated by commas, that are used to lookup words
        for keyword completion commands |i_CTRL-X_CTRL-K|.  Each file should
        contain a list of words.  This can be one word per line, or several
        words per line, separated by non-keyword characters (white space is
        preferred).
        To include a comma in a file name precede it with a backslash.  Spaces
        after a comma are ignored, otherwise spaces are included in the file
        name.  See |option-backslash| about using backslashes.
        Where to find a list of words?
        - On FreeBSD, there is the file "/usr/share/dict/words".
        - In the Simtel archive, look in the "msdos/linguist" directory.
        - In "miscfiles" of the GNU collection.
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.


                                     *'digraph'* *'dg'* *'nodigraph'* *'nodg'*
'digraph' 'dg'             boolean  (default off)
                        global
                        {not in Vi}
                        {not available when compiled without the |+digraphs|
                        feature}
        Enable the entering of digraphs in Insert mode with {char1} <BS>
        {char2}.  See |digraphs|.


                                                *'directory'* *'dir'*
'directory' 'dir'       string  (default for Amiga: ".,t:",
                                 for MS-DOS and Win32: ".,c:\tmp,c:\temp"
                                 for Unix: ".,~/tmp,/var/tmp,/tmp")
                        global
        List of directory names for the swap file, separated with commas.
        - The swap file will be created in the first directory where this is
          possible.
        - Empty means that no swap file will be used (recovery is
          impossible!).
        - A directory "." means to put the swap file in the same directory as
          the edited file.  On Unix, a dot is prepended to the file name, so
          it doesn't show in a directory listing.
        - A directory starting with "./" (or ".\" for MS-DOS et.al.) means to
          put the swap file relative to where the edited file is.  The leading
          "." is replaced with the path name of the edited file.
        - For Unix and Win32, if a directory ends in two path separators, the
          swap file name will be built from the complete path to the file
          with all path separators substituted to percent '%' signs. This will
          ensure file name uniqueness in the preserve directory.
        - Spaces after the comma are ignored, other spaces are considered part
          of the directory name.  To have a space at the start of a directory
          name, precede it with a backslash.
        - To include a comma in a directory name precede it with a backslash.
        - A directory name may end in an ':' or '/'.
        - Environment variables are expanded |:set_env|.
        - Careful with '\' characters, type one before a space, type two to
          get one in the option (see |option-backslash|), for example:
 :set dir=c:\\tmp,\ dir\\,with\\,commas,\\\ dir\ with\ spaces
        - For backwards compatibility with Vim version 3.0 a '>' at the start
          of the option is removed.
        Using "." first in the list is recommended.  This means that editing
        the same file twice will result in a warning.  Using "/tmp" on Unix is
        discouraged: When the system crashes you lose the swap file.
        "/var/tmp" is often not cleared when rebooting, thus is a better
        choice than "/tmp".  But it can contain a lot of files, your swap
        files get lost in the crowd.  That is why a "tmp" directory in your
        home directory is tried first.
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.
        {Vi: directory to put temp file in, defaults to "/tmp"}


                                        *'display'* *'dy'*
'display' 'dy'             string  (default "")
                        global
                        {not in Vi}
        Change the way text is displayed.  This is comma separated list of
        flags.  Currently only one is supported:
        lastline        When included, as much as possible of the last line
                        in a window will be displayed.  When not included, a
                        last line that doesn't fit is replaced with "@" lines.


                           *'ed'* *'edcompatible'* *'noed'* *'noedcompatible'*
'edcompatible' 'ed'   boolean  (default off)
                        global
        Makes the 'g' and 'c' flags of the ":substitute" command to be
        toggled each time the flag is given.  See |complex-change|.  See
        also 'gdefault' option.


                        *'endofline'* *'eol'* *'noendofline'* *'noeol'*
'endofline' 'eol'       boolean  (default on)
                        local to buffer
                        {not in Vi}
        When writing a file and this option is off and the 'binary' option
        is on, no <EOL> will be written for the last line in the file.  This
        option is automatically set when starting to edit a new file, unless
        the file does not have an <EOL> for the last line in the file, in
        which case it is reset.  Normally you don't have to set or reset this
        option.  When 'binary' is off the value is not used when writing the
        file.  When 'binary' is on it is used to remember the presence of a
        <EOL> for the last line in the file, so that when you write the file
        the situation from the original file can be kept.  But you can change
        it if you want to.


                             *'equalalways'* *'ea'* *'noequalalways'* *'noea'*
'equalalways' 'ea'     boolean  (default on)
                        global
                        {not in Vi}
        When on, all the windows are automatically made the same size after
        splitting or closing a window.  When off, splitting a window will
        reduce the size of the current window and leave the other windows the
        same.  When closing a window the extra lines are given to the window
        above it.


                                                *'equalprg'* *'ep'*
'equalprg' 'ep'           string  (default "")
                        global
                        {not in Vi}
        External program to use for "=" command.  When this option is empty
        the internal formatting functions are used ('lisp' or 'cindent').
        Environment variables are expanded |:set_env|.  See |option-backslash|
        about including spaces and backslashes.
        When this option is set from a |modeline|, while the 'secure' option
        is set, you will get a warning message.


                        *'errorbells'* *'eb'* *'noerrorbells'* *'noeb'*
'errorbells' 'eb'       boolean  (default off)
                        global
        Ring the bell (beep or screen flash) for error messages.  This only
        makes a difference for error messages, the bell will be used always
        for a lot of errors without a message (e.g., hitting <Esc> in Normal
        mode).  See 'visualbell' on how to make the bell behave like a beep,
        screen flash or do nothing.


                                                *'errorfile'* *'ef'*
'errorfile' 'ef' string  (Amiga default: "AztecC.Err",
                                        others: "errors.err")
                        global
                        {not in Vi}
                        {not available when compiled without the |+quickfix|
                        feature}
        Name of the errorfile for the QuickFix mode (see |:cf|).
        When the "-q" command-line argument is used, 'errorfile' is set to the
        following argument.  See |-q|.
        NOT used for the ":make" command.  See 'makeef' for that.
        Environment variables are expanded |:set_env|.
        See |option-backslash| about including spaces and backslashes.


                                                *'errorformat'* *'efm'*
'errorformat' 'efm'   string  (default is very long)
                        global
                        {not in Vi}
                        {not available when compiled without the |+quickfix|
                        feature}
        Scanf-like description of the format for the lines in the error file
        (see |errorformat|).


                                     *'esckeys'* *'ek'* *'noesckeys'* *'noek'*
'esckeys' 'ek'             boolean  (Vim default: on, Vi default: off)
                        global
                        {not in Vi}
        Function keys that start with an <Esc> are recognized in Insert
        mode.  When this option is off, the cursor and function keys cannot be
        used in Insert mode if they start with an <Esc>.  The advantage of
        this is that the single <Esc> is recognized immediately, instead of
        after one second.  Instead of resetting this option, you might want to
        try changing the values for 'timeoutlen' and 'ttimeoutlen'.  Note that
        when 'esckeys' is off, you can still map anything, but the cursor keys
        won't work by default.


                                                *'eventignore'* *'ei'*
'eventignore' 'ei'     string  (default "")
                        global
                        {not in Vi}
        A list of autocommand event names, which are to be ignored.
        When set to "all", all autocommand events are ignored, autocommands
        will not be executed.
        Otherwise this is a comma separated list of event names.  Example:
 :set ei=WinEnter,WinLeave


                                 *'expandtab'* *'et'* *'noexpandtab'* *'noet'*
'expandtab' 'et' boolean  (default off)
                        local to buffer
                        {not in Vi}
        In Insert mode: Use the appropriate number of spaces to insert a
        <Tab>.  Spaces are used in indents with the '>' and '<' commands and
        when 'autoindent' is on.  To insert a real tab when 'expandtab' is
        on, use CTRL-V<Tab>.  See also |:retab| and |ins-expandtab|.


                                        *'exrc'* *'ex'* *'noexrc'* *'noex'*
'exrc' 'ex'           boolean (default off)
                        global
                        {not in Vi}
        Enables the reading of .vimrc, .exrc and .gvimrc in the current
        directory.  If you switch this option on you should also consider
        setting the 'secure' option (see |initialization|).  Using a local
        .exrc, .vimrc or .gvimrc is a potential security leak, use with care!
        also see |.vimrc| and |gui-init|.
        This option cannot be set from a |modeline|.


                                        *'fileencoding'* *'fe'*
'fileencoding' 'fe'   string (default: "ansi")
                        local to buffer
                        {only available when compiled with the |+multi_byte|
                        feature}
                        {not in Vi}

        Enables editing of alternative encoded files, for example shift-JIS or
        Unicode.  When you set this option, it fires of a 'FileEncoding'
        autocommand so you can set up fonts if necessary.

        See |multibyte|.

        Possible values are:
            ansi        default setting, good for most Western languages
            unicode     (to be implemented>
            japan       set to use shift-JIS (Windows CP 932) encoding
            korea       set to use Korean DBCS
            prc         use simplified Chinese encoding
            taiwan      use traditional Chinese encoding
            hebrew  (to be implemented)
            farsi        (to be implemented)

        This lets you view, for example, a Japanese S-JIS encoded file
        (provided you have a suitable font).  The DBCS characters are treated
        as a unit, i.e. you cursor past them or delete them, etc as a unit,
        rather than deleting half a character.


                                        *'fileformat'* *'ff'*
'fileformat' 'ff'       string (DOS, Win32, OS/2 default: "dos",
                                Unix default: "unix",
                                Macintosh default: "mac")
                        local to buffer
                        {not in Vi}
        This gives the <EOL> of the current buffer, which is used for
        reading/writing the buffer from/to a file:
            dos       <CR> <NL>
            unix    <NL>
            mac       <CR>
        When "dos" is used, CTRL-Z at the end of a file is ignored.
        See |file-formats| and |file-read|.
        When 'binary' is set, the value of 'fileformat' is ignored, file I/O
        works like it was set to "unix'.
        This option is set automatically when starting to edit a file and
        'fileformats' is not empty and 'binary' is off.
        When this option is set, after starting to edit a file, the 'modified'
        option is set, because the file would be different when written.
        For backwards compatibility: When this option is set to "dos",
        'textmode' is set, otherwise 'textmode' is reset.


                                        *'fileformats'* *'ffs'*
'fileformats' 'ffs'   string (Vim+Vi  DOS, Win32, OS/2 default: "dos,unix",
                                Vim     Unix default: "unix,dos",
                                Vim     Mac default: "mac,unix,dos",
                                Vi  others default: "")
                        global
                        {not in Vi}
        This gives the end-of-line (<EOL>) formats that will be tried.  It is
        used when starting to edit a new buffer and when reading a file into
        an existing buffer:
        - When empty, the format defined with 'fileformat' will be used
          always.  It is not set automatically.
        - When set to one name, that format will be used whenever a new buffer
          is opened.  'fileformat' is set accordingly for that buffer.  The
          'fileformats' name will be used when a file is read into an existing
          buffer, no matter what 'fileformat' for that buffer is set to.
        - When more than one name is present, separated by commas, automatic
          <EOL> detection will be done when reading a file.  When starting to
          edit a file, a check is done for the <EOL>:
          1. If all lines end in <CR><NL>, and 'fileformats' includes "dos",
             'fileformat' is set to "dos".
          2. If a <NL> is found and 'fileformats' includes "unix, 'fileformat'
             is set to "unix".  Note that when a <NL> is found without a
             preceding <CR>, "unix" is preferred over "dos".
          3. If 'fileformats' includes "mac", 'fileformat' is set to "mac".
             This means that "mac" is only chosen when "unix" is not present,
             or when no <NL> is found in the file, and when "dos" is not
             present, or no <CR><NL> is present in the file.
             Also if "unix" was first chosen, but the first <CR> is before
             the first <NL> and there appears to be more <CR>'s than <NL>'s in
             the file, then 'fileformat' is set to "mac".
          4. If 'fileformat' is still not set, the first name from
             'fileformats' is used.
          When reading a file into an existing buffer, the same is done, but
          this happens like 'fileformat' has been set appropriately for that
          file only, the option is not changed.
        When 'binary' is set, the value of 'fileformats' is not used.

        For systems with a Dos-like <EOL> (<CR><NL>), when reading files that
        are ":source"ed and for vimrc files, automatic <EOL> detection may be
        done:
        - When 'fileformats' is empty, there is no automatic detection.  Dos
          format will be used.
        - When 'fileformats' is set to one or more names, automatic detection
          is done.  This is based on the first <NL> in the file: If there is a
          <CR> in front of it, Dos format is used, otherwise Unix format is
          used.
        Also see |file-formats|.
        For backwards compatibility: When this option is set to an empty
        string or one format (no comma is included), 'textauto' is reset,
        otherwise 'textauto' is set.


                                        *'filetype'* *'ft'*
'filetype' 'ft'           string (default: "")
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the |+autocmd|
                        feature}
        When this option is set, the FileType autocommand event with this name
        is triggered.  Otherwise this option does not always reflect the
        current file type.
        This option is most useful in a modeline, for a file for which the
        file type is not automatically recognized.  Example, for in an IDL
        file:
 /* vim: set filetype=idl : */
        |FileType| |autocmd-filetypes|
        Do not confuse this option with 'osfiletype', which is for the file
        type that is actually stored with the file.
        This option is not copied to another buffer, independent of the 's' or
        'S' flag in 'cpoptions'.


                                        *'fkmap'* *'fk'* *'nofkmap'* *'nofk'*
'fkmap' 'fk'         boolean (default off)
                        global
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        When on, the keyboard is mapped for the Farsi character set.
        Normally you would set 'allowrevins' and use CTRL-_ in insert mode to
        toggle this option |i_CTRL-_|.  See |farsi.txt|.


                                        *'formatoptions'* *'fo'*
'formatoptions' 'fo' string (Vim default: "tcq", Vi default: "vt")
                        local to buffer
                        {not in Vi}
        This is a sequence of letters which describes how automatic
        formatting is to be done.  See |fo-table|.  When the 'paste' option is
        on, no formatting is done (like 'formatoptions' is empty).  Commas can
        be inserted for readability.
        To avoid problems with flags that are added in the future, use the
        "+=" and "-=" feature of ":set" |add-option-flags|.


                                                *'formatprg'* *'fp'*
'formatprg' 'fp' string (default "")
                        global
                        {not in Vi}
        The name of an external program that will be used to format the lines
        selected with the "gq" command.  The program must take the input on
        stdin and produce the output on stdout.  The Unix program "fmt" is
        such a program.  If this option is an empty string, the internal
        format function will be used |C-indenting|.  Environment variables are
        expanded |:set_env|.  See |option-backslash| about including spaces
        and backslashes.
        When this option is set from a |modeline|, while the 'secure' option
        is set, you will get a warning message.


                                   *'gdefault'* *'gd'* *'nogdefault'* *'nogd'*
'gdefault' 'gd'           boolean  (default off)
                        global
                        {not in Vi}
        When on, the ":substitute" flag 'g' is default on.  This means that
        all matches in a line are substituted instead of one.  When a 'g' flag
        is given to a ":substitute" command, this will toggle the substitution
        of all or one match.  See |complex-change|.

 command 'gdefault' on 'gdefault' off 
                :s///             subst. all      subst. one
                :s///g            subst. one      subst. all
                :s///gg           subst. all      subst. one


                                                *'grepformat'* *'gfm'*
'grepformat' 'gfm'     string  (default "%f:%l%m,%f  %l%m")
                        global
                        {not in Vi}
        Format to recognize for the ":grep" command output.
        This is a scanf-like string that uses the same format as the
        'errorformat' option: see |errorformat|.


                                                *'grepprg'* *'gp'*
'grepprg' 'gp'             string  (default "grep -n", Win32: "findstr /n")
                        global
                        {not in Vi}
        Program to use for the ":grep" command. This option may contain '%'
        and '#' characters, which are expanded like when used in a command-
        line.  The placeholder "$*" is allowed to specify where the arguments
        will be included.  Environment variables are expanded |:set_env|.  See
        |option-backslash| about including spaces and backslashes.

        See also the section |:make_makeprg|, since most of the comments there
        apply equally to 'grepprg'.
        When this option is set from a |modeline|, while the 'secure' option
        is set, you will get a warning message.


                                                *'guicursor'* *'gcr'*
'guicursor' 'gcr'       string  (default "n-v-c:block-Cursor,ve:ver35-Cursor,
                                        o:hor50-Cursor,i-ci:ver25-Cursor,
                                        r-cr:hor20-Cursor,sm:block-Cursor
                                        -blinkwait175-blinkoff150-blinkon175")
                        global
                        {not in Vi}
                        {only available when compiled with GUI enabled, and
                        for MSDOS and Win32 console}
        This option tells Vim what the cursor should look like in different
        modes.  The option is a comma separated list of parts.  Each part
        consist of a mode-list and an argument-list:
                mode-list:argument-list,mode-list:argument-list,..
        The mode-list is a dash separated list of these modes:
                n  Normal mode
                v   Visual mode
                ve      Visual mode with 'selection' "exclusive" (same as 'v',
                        if not specified)
                o   Operator-pending mode
                i   Insert mode
                r   Replace mode
                c   Command-line Normal (append) mode
                ci      Command-line Insert mode
                cr      Command-line Replace mode
                sm      showmatch in Insert mode
                a       all modes
        The argument-list is a dash separated list of these arguments:
                hor{N}  horizontal bar, {N} percent of the character height
                ver{N}  vertical bar, {N} percent of the character width
                block   block cursor, fills the whole character
                        [only one of the above three should be present]

                blinkwait{N}                            *cursor-blinking*
                blinkon{N}
                blinkoff{N}
                        blink times for cursor: blinkwait is the delay before
                        the cursor starts blinking, blinkon is the time that
                        the cursor is shown and blinkoff is the time that the
                        cursor is not shown.  The times are in msec.  When one
                        of the numbers is zero, there is no blinking.  The
                        default is: "blinkwait700-blinkon400-blinkoff250".
                        These numbers are used for a missing entry.  This
                        means that blinking is enabled by default.  To switch
                        blinking off you can use "blinkon0".  The cursor only
                        blinks when Vim is waiting for input, not while
                        executing a command.
                        To make the cursor blink in an xterm, see
                        tools/blink.c.
                {group-name}
                        a highlight group name, that sets the color and font
                        for the cursor
        Examples of parts:
           n-c-v:block-nCursor  in Normal, Command-line and Visual mode, use a
                                block cursor with colors from the "nCursor"
                                highlight group
           i-ci:ver30-iCursor-blinkwait300-blinkon200-blinkoff150
                                In Insert and Command-line Insert mode, use a
                                30% vertical bar cursor with colors from the
                                "iCursor" highlight group.  Blink a bit
                                faster.

        The 'a' mode is different.  It will set the given argument-list for
        all modes.  It does not reset anything to defaults.  This can be used
        to do a common setting for all modes.  For example, to switch off
        blinking: "a:blinkon0"

        Examples of cursor highlighting:
 :highlight Cursor gui=reverse guifg=NONE guibg=NONE
 :highlight Cursor gui=NONE guifg=bg guibg=fg

        In an MSDOS or Win32 console, only the height of the cursor can be
        changed.  This can be done by specifying a block cursor, or a
        percentage for a vertical or horizontal cursor.


                                                *'guifont'* *'gfn'*
'guifont' 'gfn'           string  (default "")
                        global
                        {not in Vi}
                        {only available when compiled with GUI enabled}
        This is a list of fonts which should be tried when starting the GUI
        version of vim.  The fonts are separated with commas.  Spaces after a
        comma are ignored.  To include a comma in a font name precede it with
        a backslash.  Setting an option requires an extra backslash before a
        space and a backslash.  See also |option-backslash|.  For example:
 :set guifont=Screen15,\ 7x13,font\\,with\\,commas
        will make vim try to use the font "Screen15" first, and if it fails
        it will try to use "7x13" and then "font,with,commas" instead.
        Note that the fonts must be mono-spaced (all characters have the same
        width).
        To preview a font on X11, you might be able to use the "xfontsel"
        program.  The "xlsfonts" program gives a list of all available fonts.
        Win32 and GTK only:
 :set guifont=*
        will bring up a font requester, where you can pick the font you want.
        If none of the fonts can be loaded, vim will keep the current setting.
        If an empty font list is given, vim will try using other resource
        settings (for X, it will use the Vim.font resource), and finally it
        will try some builtin default which should always be there ("7x13" in
        the case of X).  The font names given should be "normal" fonts.  Vim
        will try to find the related bold and italic fonts.
        For the Win32 GUI
        - takes these options in the font name:
                hXX - height is XX (points)
                wXX - width is XX (points)
                b   - bold
                i   - italic
                u   - underline
                s   - strikeout
          Use a ':' to separate the options.
        - A '_' can be used in the place of a space, so you don't need to use
          backslashes to escape the spaces.
        - Example:
 :set guifont=courier_new:h12:w5:b
 Have a look at http://nova.bsuvc.bsu.edu/prn/monofont/ for
        mono-spaced fonts and comments on them.
        See also |font-sizes|.


                                                *'guiheadroom'* *'ghr'*
'guiheadroom' 'ghr'   number  (default 50)
                        global
                        {not in Vi} {only for GTK and X11 GUI}
        The number of pixels subtracted from the screen height when fitting
        the GUI window on the screen.  Set this before the GUI is started,
        e.g., in your |gvimrc| file.  When zero, the whole screen height will
        be used by the window.  When positive, the specified number of pixel
        lines will be left for window decorations and other items on the
        screen.  Set it to a negative value to allow windows taller than the
        screen.


                                                *'guifontset'* *'gfs'*
'guifontset' 'gfs'     string  (default "")
                        global
                        {not in Vi}
                        {only available when compiled with GUI enabled and
                        with the |+xfontset| feature}
        When not empty, specifies two fonts to be used.  The first one for
        normal english, the second one for your special language.  See
        |xfontset|.


                                                *'guioptions'* *'go'*
'guioptions' 'go'       string  (default "agimrtT" (GTK), "agimrt" (Unix) or
                                        "gmrt")
                        global
                        {not in Vi}
                        {only available when compiled with GUI enabled}
        This option only has an effect in the GUI version of vim.  It is a
        sequence of letters which describes what components and options of the
        GUI should be used.
        To avoid problems with flags that are added in the future, use the
        "+=" and "-=" feature of ":set" |add-option-flags|.

        Valid letters are as follows:

                                                        *guioptions_a*
          'a'       Autoselect:  If present, then whenever VISUAL mode is started,
                or the Visual area extended, Vim tries to become the owner of
                the windowing system's global selection.  This means that the
                Visually highlighted text is available for pasting into other
                applications as well as into Vim itself.  When the Visual mode
                ends, possibly due to an operation on the text, or when an
                application wants to paste the selection, the highlighted text
                is automatically yanked into the "* selection register.
                Thus the selection is still available for pasting into other
                applications after the VISUAL mode has ended.
                    If not present, then Vim won't become the owner of the
                windowing system's global selection unless explicitly told to
                by a yank or delete operation.

          'f'       Foreground: Don't use fork() to detach the GUI from the shell
                where it was started.  Use this for programs that wait for the
                editor to finish (e.g., an e-mail program).  Alternatively you
                can use "gvim -f" or ":gui -f" to start the GUI in the
                foreground.  |gui-fork|

          'i'       Use a Vim icon.  For GTK with KDE it is used in the left-upper
                corner of the window.  It's black&white on non-GTK, because of
                limitations of X11.  For a color icon, see |X11-icon|.

          'm'       Menu bar is present.
          'M'       The system menu "$VIMRUNTIME/menu.vim" is not sourced.  Note
                that this flag must be added in the .vimrc file.  When the
                .gvimrc file is sourced the system menu has already been
                loaded.
          'g'        Grey menu items: Make menu items that are not active grey.  If
                'g' is not included inactive menu items are not shown at all.

          't'       Include tearoff menu items.  Currently only works for Win32,
                GTK+, and Motif 1.2 GUI.
          'T'       Include Toolbar.  Currently only in Win32 and GTK+ GUI.

          'r'       Right-hand scrollbar is present when 'r' is included.
          'l'       Left-hand scrollbar is present when 'l' is included.
          'b'       Bottom (horizontal) scrollbar is present when 'b' is included.

        And yes, you may even have scrollbars on the left AND the right if
        you really want to :-).  See |gui-scrollbars| for more information.

          'v'       Use a vertical button layout for dialogs.  When not included,
                a horizontal layout is preferred, but when it doesn't fit a
                vertical layout is used anyway.
          'p'       Use Pointer callbacks for X11 GUI.  This is required for some
                window managers.  If the cursor is not blinking or hollow at
                the right moment, try adding this flag.  This must be done
                before starting the GUI.  Set it in your gvimrc.  Adding or
                removing it after the GUI has started has no effect.


                                                *'guipty'* *'noguipty'*
'guipty'                boolean  (default on)
                        global
                        {not in Vi}
                        {only available when compiled with GUI enabled}
        Only in the GUI: If on, an attempt is made to open a pseudo-tty for
        I/O to/from shell commands.  See |gui-pty|.


                                        *'helpfile'* *'hf'*
'helpfile' 'hf'           string  (default (MSDOS)  "$VIMRUNTIME\doc\help.txt"
                                         (others) "$VIMRUNTIME/doc/help.txt")
                        global
                        {not in Vi}
        Name of the help file.  All help files should be placed together in
        one directory.  Environment variables are expanded |:set_env|.  For
        example: "$VIMRUNTIME/doc/help.txt".  If $VIMRUNTIME is not set, $VIM
        is also tried.  Also see |$VIMRUNTIME| and |option-backslash|
        about including spaces and backslashes.


                                                *'helpheight'* *'hh'*
'helpheight' 'hh'       number  (default 20)
                        global
                        {not in Vi}
        Minimal initial height of the help window when it is opened with the
        ":help" command.  The initial height of the help window is half of the
        current window, or (when the 'ea' option is on) the same as other
        windows.  When the height is less than 'helpheight', the height is
        set to 'helpheight'.  Set to zero to disable.


                                     *'hidden'* *'hid'* *'nohidden'* *'nohid'*
'hidden' 'hid'             boolean  (default off)
                        global
                        {not in Vi}
        When off a buffer is unloaded when it is |abandon|ed.  When on a
        buffer becomes hidden when it is |abandon|ed.  If the buffer is still
        displayed in another window, it does not become hidden, of course.
        The commands that move through the buffer list sometimes make a buffer
        hidden although the 'hidden' option is off: When the buffer is
        modified, 'autowrite' is off or writing is not possible, and the '!'
        flag was used.  See also |windows.txt|.
        WARNING: It's easy to forget that you have changes in hidden buffers.
        Think twice when using ":q!" or ":qa!".


                                                *'highlight'* *'hl'*
'highlight' 'hl' string  (default (as a single string):
                                     "8:SpecialKey,@:NonText,d:Directory,
                                     e:ErrorMsg,i:IncSearch,l:Search,m:MoreMsg,
                                     M:ModeMsg,n:LineNr,r:Question,
                                     s:StatusLine,S:StatusLineNC,t:Title,
                                     v:Visual,w:WarningMsg")
                        global
                        {not in Vi}
        This option can be used to set highlighting mode for various
        occasions.  It is a comma separated list of character pairs.  The
        first character in a pair gives the occasion, the second the mode to
        use for that occasion.  The occasions are:
        |hl-SpecialKey|  8  Meta and special keys listed with ":map"
        |hl-NonText|        @  '~' and '@' at the end of the window and
                            characters from 'showbreak'
        |hl-Directory|    d  directories in CTRL-D listing and other special
                            things in listings
        |hl-ErrorMsg|      e  error messages
                         h  (obsolete, ignored)
        |hl-IncSearch|    i  'incsearch' highlighting
        |hl-Search|  l  last search pattern highlighting (see 'hlsearch')
        |hl-MoreMsg|        m  |more-prompt|
        |hl-ModeMsg|        M  Mode (e.g., "-- INSERT --")
        |hl-LineNr|  n  line number for ":number" and ":#" commands
        |hl-Question|      r  |hit-return| prompt and yes/no questions
        |hl-StatusLine|  s  status line of current window |status-line|
        |hl-StatusLineNC| S  status lines of not-current windows
        |hl-Title|    t  Titles for output from ":set all", ":autocmd" etc.
        |hl-Visual|  v  Visual mode
        |hl-VisualNOS|    V  Visual mode when Vim does is "Not Owning the
                            Selection" Only X11 Gui's |gui-x11| and
                            |xterm-clipboard|.
        |hl-WarningMsg|  w  warning messages

        The display modes are:
                r   reverse         (termcap entry "mr" and "me")
                i   italic          (termcap entry "ZH" and "ZR")
                b   bold            (termcap entry "md" and "me")
                s   standout        (termcap entry "so" and "se")
                u     underline       (termcap entry "us" and "ue")
                n  no highlighting
                -       no highlighting
                :       use a highlight group
        The default is used for occasions that are not included.
        If you want to change what the display modes do, see |dos-colors|
        for an example.
        When using the ':' display mode, this must be followed by the name of
        a highlight group.  A highlight group can be used to define any type
        of highlighting, including using color.  See |:highlight| on how to
        define one.  The default uses a different group for each occasion.
        See |highlight-default| for the default highlight groups.


                                 *'hlsearch'* *'hls'* *'nohlsearch'* *'nohls'*
'hlsearch' 'hls' boolean  (default off)
                        global
                        {not in Vi}
                        {not available when compiled without the
                        |+extra_search| feature}
        When there is a previous search pattern, highlight all its matches.
        The type of highlighting used can be set with the 'l' occasion in the
        'highlight' option.  This uses the "Search" highlight group by
        default.  Note that only the matching text is highlighted, any offsets
        are not applied.
        See also: 'incsearch'.
        When you get bored looking at the highlighted matches, you can turn it
        off with |:nohlsearch|.  As soon as you use a search command, the
        highlighting comes back.


                                                *'history'* *'hi'*
'history' 'hi'             number  (Vim default: 20, Vi default: 0)
                        global
                        {not in Vi}
        A history of ":" commands, and a history of previous search patterns
        are remembered.  This option decides how many entries may be stored in
        each of these histories (see |cmdline-editing|).


                                         *'hkmap'* *'hk'* *'nohkmap'* *'nohk'*
'hkmap' 'hk'         boolean (default off)
                        global
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        When on, the keyboard is mapped for the Hebrew character set.
        Normally you would set 'allowrevins' and use CTRL-_ in insert mode to
        toggle this option.  See |rightleft.txt|.


                                 *'hkmapp'* *'hkp'* *'nohkmapp'* *'nohkp'*
'hkmapp' 'hkp'             boolean (default off)
                        global
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        When on, phonetic keyboard mapping is used.  'hkmap' must also be on.
        This is useful if you have a non-Hebrew keyboard.
        See |rightleft.txt|.


                                                *'icon'* *'noicon'*
'icon'                    boolean  (default off, on when title can be restored)
                        global
                        {not in Vi}
                        {not available when compiled without the |+title|
                        feature}
        When on, the icon text of the window will be set to the value of
        'iconstring' (if it is not empty), or to the name of the file
        currently being edited.  Only the last part of the name is used.
        Overridden by the 'iconstring' option.
        Only works if the terminal supports setting window icons (currently
        only X11 GUI and terminals with a non-empty 't_IS' option - these are
        Unix xterm and iris-ansi by default, where 't_IS' is taken from the
        builtin termcap).
        When Vim was compiled with HAVE_X11 defined, the original icon will be
        restored if possible |X11|. See |X11-icon| for changing the icon on
        X11.


                                                *'iconstring'*
'iconstring'                string  (default "")
                        global
                        {not in Vi}
                        {not available when compiled without the |+title|
                        feature}
        When this option is not empty, it will be used for the icon text of
        the window.  This happens only when the 'icon' option is on.
        Only works if the terminal supports setting window icon text
        (currently only X11 GUI and terminals with a non-empty 't_IS' option).
        Does not work for MS Windows.
        When Vim was compiled with HAVE_X11 defined, the original icon will be
        restored if possible |X11|.
        When this option contains printf-style '%' items, they will be
        expanded according to the rules used for 'statusline'.  See
        'titlestring' for example settings.
        {not available when compiled without the |+statusline| feature}


                        *'ignorecase'* *'ic'* *'noignorecase'* *'noic'*
'ignorecase' 'ic'       boolean  (default off)
                        global
        Ignore case in search patterns.  Also used when searching in the tags
        file.


                                                *'include'* *'inc'*
'include' 'inc'           string  (default "^#\s*include")
                        global
                        {not in Vi}
        Pattern to be used to find an include command.  It is a search
        pattern, just like for the "/" command (See |pattern|).  The default
        value is for C programs.  This option is used for the commands "[i",
        "]I", "[d", etc..  The 'isfname' option is used to recognize the file
        name that comes after the matched pattern.  See |option-backslash|
        about including spaces and backslashes.


                                 *'incsearch'* *'is'* *'noincsearch'* *'nois'*
'incsearch' 'is' boolean  (default off)
                        global
                        {not in Vi}
                        {not available when compiled without the
                        |+extra_search| feature}
        While typing a search pattern, show immediately where the so far
        typed pattern matches.  The matched string is highlighted.  If the
        pattern is invalid or not found, nothing is shown.  The screen will
        be updated often, this is only useful on fast terminals.  Note that
        the match will be shown, but the cursor is not actually positioned
        there.  You still need to finish the search command with <CR> to move
        the cursor.  The highlighting can be set with the 'i' flag in
        'highlight'.  See also: 'hlsearch'.


                        *'infercase'* *'inf'* *'noinfercase'* *'noinf'*
'infercase' 'inf'       boolean  (default off)
                        local to buffer
                        {not in Vi}
        When doing keyword completion in insert mode |ins-completion|, and
        'ignorecase' is also on, the case of the match is adjusted.  If the
        typed text contains a lowercase letter where the match has an upper
        case letter, the completed part is made lower case.  If the typed text
        has no lower case letters and the match has a lower case letter where
        the typed text has an upper case letter, and there is a letter before
        it, the completed part is made uppercase.


                        *'insertmode'* *'im'* *'noinsertmode'* *'noim'*
'insertmode' 'im'       boolean  (default off)
                        global
                        {not in Vi}
        Makes Vim work in a way that Insert mode is the default mode.  Useful
        if you want to use Vim as a modeless editor.
        These Insert mode commands will be useful:
        - Use the cursor keys to move around.
        - Use CTRL-O to execute one Normal mode command |i_CTRL-O|).  When
          this is a mapping, it is executed as if 'insertmode' was off.
          Normal mode remains active until the mapping is finished.

                                                                *i_CTRL-L*
        - Use CTRL-L to execute a number of Normal mode commands, then use
          <Esc> to get back to Insert mode.

        These items change when 'insertmode' is set:
        - when starting to edit of a file, Vim goes to Insert mode.
        - <Esc> in Insert mode is a no-op and beeps.
        - <Esc> in Normal mode makes Vim go to Insert mode.
        - CTRL-L in Insert mode is a command, it is not inserted.

        - CTRL-Z in Insert mode suspends Vim, see |CTRL-Z|.  *i_CTRL-Z*
        However, when <Esc> is used inside a mapping, it behaves like
        'insertmode' was not set.  This was done to be able to use the same
        mappings with 'insertmode' set or not set.


                                                *'isfname'* *'isf'*
'isfname' 'isf'           string  (default for MS-DOS, Win32 and OS/2:
                                            "@,48-57,/,.,-,_,+,,,$,:,!,\"
                                 for AMIGA: "@,48-57,/,.,-,_,+,,,$,:"
                                 otherwise: "@,48-57,/,.,-,_,+,,,$,~")
                        global
                        {not in Vi}
        The characters given by this option are included in file names and
        path names.  Filenames are used for commands like "gf", "[i" and in
        the tags file.  It is also used for "\f" in a |pattern|.
        Besides the characters in this option characters that are defined by
        the C function isalpha() are also always included (this depends on the
        character set and "locale").

        Note that on systems using a backslash as path separator, Vim tries to
        do its best to make it work as you would expect.  That is a bit
        tricky, since Vi originally used the backslash to escape special
        characters.  Vim on will not remove a backslash in front of a normal
        file name character on these systems, but it will on Unix and alikes.

        The format of this option is a list of parts, separated with commas.
        Each part can be a single character number or a range.  A range is two
        character numbers with '-' in between.  A character number can be a
        decimal number between 0 and 255 or the ASCII character itself (does
        not work for digits).  Example:
                "_,-,128-140,#-43"    (include '_' and '-' and the range
                                        128 to 140 and '#' to 43)
        If a part starts with '^', the following character number or range
        will be excluded from the option.  The option is interpreted from left
        to right.  Put the excluded character after the range where it is
        included.  To include '^' itself use it as the last character of the
        option or the end of a range.  Example:
                "^a-z,#,^"    (exclude 'a' to 'z', include '#' and '^')
        If the character is '@', all characters where isalpha() returns TRUE
        are included.  Normally these are the characters a to z and A to Z,
        plus accented characters.  To include '@' itself use "@-@".  Examples:
                "@,^a-z"      All alphabetic characters, excluding lower
                                case letters.
                "a-z,A-Z,@-@" All letters plus the '@' character.
        A comma can be included by using it where a character number is
        expected.  Example:
                "48-57,,,_"   Digits, command and underscore.
        A comma can be excluded by prepending a '^'.  Example:
                " -~,^,,9"    All characters from space to '~', excluding
                                comma, plus <Tab>.
        See |option-backslash| about including spaces and backslashes.


                                                *'isident'* *'isi'*
'isident' 'isi'           string  (default for MS-DOS, Win32 and OS/2:
                                           "@,48-57,_,128-167,224-235"
                                otherwise: "@,48-57,_,192-255")
                        global
                        {not in Vi}
        The characters given by this option are included in identifiers.
        Identifiers are used in recognizing environment variables and after a
        match of the 'define' option.  It is also used for "\i" in a
        |pattern|. See 'isfname' for a description of the format of this
        option.
        Careful: If you change this option, it might break expanding
        environment variables.  E.g., when '/' is included and Vim tries to
        expand "$HOME/.viminfo".  Maybe you should change 'iskeyword' instead.


                                                *'iskeyword'* *'isk'*
'iskeyword' 'isk'       string (Vim default for MS-DOS and Win32:
                                            "@,48-57,_,128-167,224-235"
                                   otherwise:  "@,48-57,_,192-255"
                                Vi default: "@,48-57,_")
                        local to buffer
                        {not in Vi}
        Keywords are used in searching and recognizing with many commands:
        "w", "*", "[i", etc.  It is also used for "\k" in a |pattern|.  See
        'isfname' for a description of the format of this option.  For C
        programs you could use "a-z,A-Z,48-57,_,.,-,>".
        For a help file it is set to all non-blank printable characters except
        '*', '"'' and '|'.  When the 'lisp' option is on the '-' character is
        always included.


                                                *'isprint'* *'isp'*
'isprint' 'isp'   string  (default for MS-DOS and Win32: "@,~-255"
                                  otherwise:           "@,161-255")
                        global
                        {not in Vi}
        The characters given by this option are displayed directly on the
        screen.  It is also used for "\p" in a |pattern|.  The characters from
        space (ascii 32) to '~' (ascii 126) are always displayed directly,
        even when they are not included in 'isprint' or excluded.  See
        'isfname' for a description of the format of this option.
        Non-printable characters are displayed with two characters:
                  0 -  31       "^@" - "^_"
                 32 - 126       always single characters
                   127          "^?"
                128 - 159       "~@" - "~_"
                160 - 254       "| " - "|~"
                   255          "~?"


                        *'joinspaces'* *'js'* *'nojoinspaces'* *'nojs'*
'joinspaces' 'js'       boolean  (default on)
                        global
                        {not in Vi}
        Insert two spaces after a '.', '?' and '!' with a join command.
        When 'cpoptions' includes the 'j' flag, only do this after a '.'.
        Otherwise only one space is inserted.


                                                        *'key'*
'key'                      string  (default "")
                        local to buffer
                        {not in Vi}
        The key that is used for encrypting and decrypting the current buffer.
        See |encryption|.
        Careful: Do not set the key value by hand, someone might see the typed
        key.  Use the |:X| command.  But you can make 'key' empty:
 set key=
        It is not possible to get the value of this option with ":set key" or
        "echo &key".  This is to avoid showing it to someone who shouldn't
        know.  It also means you cannot see it yourself once you have set it,
        be careful not to make a typing error!


                                        *'keymodel'* *'km'*
'keymodel' 'km'           string  (default "")
                        global
                        {not in Vi}
        List of comma separated words, which enable special things that keys
        can do.  These values can be used:
           startsel     Using a shifted special key starts selection (either
                        Select mode or Visual mode, depending on "key" being
                        present in 'selectmode').
           stopsel      Using a not-shifted special key stops selection.
        Special keys in this context are the cursor keys, <End>, <Home>,
        <PageUp> and <PageDown>.
        The 'keymodel' option is set by the |:behave| command.


                                        *'keywordprg'* *'kp'*
'keywordprg' 'kp'       string  (default "man" or "man -s",  DOS: "",
                                                OS/2: "view /", VMS: "help")
                        global
                        {not in Vi}
        Program to use for the |K| command.  Environment variables are
        expanded |:set_env|.  When empty ":help" is used.
        When "man" is used, Vim will automatically translate a count for the
        "K" command to a section number.  Also for "man -s", in which case the
        "-s" is removed when there is no count.
        See |option-backslash| about including spaces and backslashes.
        Example:
 :set keywordprg=man\ -s
        When this option is set from a |modeline|, while the 'secure' option
        is set, you will get a warning message.


                                        *'langmap'* *'lmap'*
'langmap' 'lmap' string  (default "")
                        global
                        {not in Vi}
                        {only available when compiled with the |+langmap|
                        feature}
        This option allows support for keyboards that have a mode for a
        special language.  The idea is that when you are typing text in Insert
        mode your keyboard is switched in the special language mode, you get
        different key codes for the special characters.  When in command mode
        the 'langmap' option takes care of translating these special
        characters to the original meaning of the key.  This means you don't
        have to change the keyboard mode to be able to execute normal mode
        commands.


        Example (for greek):                                    *greek*
 :set langmap=ÁA,ÂB,ØC,ÄD,ÅE,ÖF,ÃG,ÇH,ÉI,ÎJ,ÊK,ËL,ÌM,ÍN,ÏO,ÐP,QQ,ÑR,ÓS,ÔT,ÈU,ÙV,WW,×X,ÕY,ÆZ,áa,âb,øc,äd,åe,öf,ãg,çh,éi,îj,êk,ël,ìm,ín,ïo,ðp,qq,ñr,ós,ôt,èu,ùv,òw,÷x,õy,æz
        Example (exchanges meaning of z and y for commands):
 :set langmap=zy,yz,ZY,YZ

        The 'langmap' option is a list of parts, separated with commas.  Each
        part can be in one of two forms:
        1.  A list of pairs.  Each pair is a "from" character immediately
            followed by the "to" character.  Examples: "aA", "aAbBcC".
        2.  A list of "from" characters, a semi-colon and a list of "to"
            characters.  Example: "abc;ABC"
        Example: "aA,fgh;FGH,cCdDeE"
        Special characters need to be preceded with a backslash.  These are
        ";", ',' and backslash itself.

        This will allow you to activate vim actions without having to switch
        back and forth between the languages.  Your language characters will
        be understood as normal vim English characters (according to the
        langmap mappings) in the following cases:
         o Normal/Visual mode (commands, buffer/register names, user mappings)
         o Insert/Replace Mode: Register names after CTRL-R
         o Insert/Replace Mode: Mappings
        Characters entered in Command-line mode will NOT be affected by
        this option.   Note that this option can be changed at any time
        allowing to switch between mappings for different languages/encodings.
        Use a mapping to avoid having to type it each time!


                                        *'laststatus'* *'ls'*
'laststatus' 'ls'       number  (default 1)
                        global
                        {not in Vi}
        The value of this option influences when the last window will have a
        status line:
                0: never
                1: only if there are at least two windows
                2: always
        The screen looks nicer with a status line if you have several
        windows, but it takes another screen line.


                        *'lazyredraw'* *'lz'* *'nolazyredraw'* *'nolz'*
'lazyredraw' 'lz'       boolean  (default off)
                        global
                        {not in Vi}
        When this option is set, the screen will not be redrawn while
        executing macros, registers and other commands that have not been
        typed.


                        *'linebreak'* *'lbr'* *'nolinebreak'* *'nolbr'*
'linebreak' 'lbr'       boolean  (default off)
                        local to window
                        {not in Vi}
                        {not available when compiled without the  |+linebreak|
                        feature}
        If on Vim will wrap long lines at a character in 'breakat' rather
        than at the last character that fits on the screen.  Unlike
        'wrapmargin' and 'textwidth', this does not insert <EOL>s in the file,
        it only affects the way the file is displayed, not its contents.  The
        value of 'showbreak' is used to put in front of wrapped lines.  This
        option is not used when the 'wrap' option is off.  Note that <Tab>
        characters after an <EOL> are mostly not displayed correctly.


                                                *'lines'*
'lines'                  number  (default 24 or terminal height)
                        global
        Number of lines in the display.  Normally you don't need to set this.
        That is done automatically by the terminal initialization code.  When
        you do set this, and Vim is unable to change the physical number of
        lines on the display, redisplaying may be wrong.


                                                *'lisp'* *'nolisp'*
'lisp'                    boolean  (default off)
                        local to buffer
                        {not available when compiled without the |+lispindent|
                        feature}
        Lisp mode: When a return is typed in insert mode set the indent for
        the next line to Lisp standards (well, sort of).  Also happens with
        "cc" or "S".  'autoindent' must also be on for this to work.  The 'p'
        flag in 'cpoptions' changes the method of indenting: Vi compatible or
        better.
        The '-' character is included in keyword characters.  Redefines the
        "=" operator to use this same indentation algorithm rather than
        calling an external program if 'equalprg' is empty.  This option is
        reset when 'paste' is set.  {Vi: Does it a little bit differently}


                                                *'list'* *'nolist'*
'list'                    boolean  (default off)
                        local to window
        List mode: Show tabs as CTRL-I, show end of line with $.  Useful to
        see the difference between tabs and spaces and for trailing blanks.
        Note that this will also affect formatting (set with 'textwidth' or
        'wrapmargin') when 'cpoptions' includes 'L'.  See 'listchars' for
        changing the way tabs are displayed.


                                                *'listchars'* *'lcs'*
'listchars' 'lcs'       string  (default "eol:$")
                        global
                        {not in Vi}
        Strings to use in 'list' mode.  It is a comma separated list of string
        settings.
          eol:c         Character to show at the end of each line.  When
                        omitted, there is no extra character at the end of the
                        line.
          tab:xy        Two characters to be used to show a Tab.  The first
                        char is used once.  The second char is repeated to
                        fill the space that the Tab normally occupies.
                        "tab:>-" will show a Tab that takes four spaces as
                        ">---".  When omitted, a Tab is show as ^I.
          trail:c       Character to show for trailing spaces.  When omitted,
                        trailing spaces are blank.
          extends:c     Character to show in the last column, when 'wrap' is
                        off and the line continues beyond the right of the
                        screen.
        The characters ':' and ',' cannot be used.
        Examples:
 :set lcs=tab:>-,trail:-
 :set lcs=tab:>-,eol:<
        The "NonText" highlighting will be used for these characters.


                                                *'magic'* *'nomagic'*
'magic'                  boolean  (default on)
                        global
        Changes the special characters that can be used in search patterns.
        See |pattern|.  NOTE: To avoid portability problems with using
        patterns, always keep this option at the default "on".


                                                *'makeef'* *'mef'*
'makeef' 'mef'             string  (Amiga default: "t:vim##.Err",
                                          Unix: "/tmp/vim##.err",
                                        others: "vim##.err")
                        global
                        {not in Vi}
                        {not available when compiled without the |+quickfix|
                        feature}
        Name of the errorfile for the ":make" command (see |:make_makeprg|).
        When "##" is included, it is replaced by a number to make the name
        unique.  This makes sure that the ":make" command doesn't overwrite an
        existing file.
        NOT used for the ":cf" command.  See 'errorfile' for that.
        Environment variables are expanded |:set_env|.
        See |option-backslash| about including spaces and backslashes.


                                                *'makeprg'* *'mp'*
'makeprg' 'mp'             string  (default "make")
                        global
                        {not in Vi}
        Program to use for the ":make" command.  See |:make_makeprg|.  This
        option may contain '%' and '#' characters, which are expanded like
        when used in a command-line.  Environment variables are expanded
        |:set_env|.  See |option-backslash| about including spaces and
        backslashes.  Note that a '|' must be escaped twice: once for ":set"
        and once for the interpretation of a command.  When you use a filter
        called "myfilter" do it like this:
 :set makeprg=gmake\ \\\|\ myfilter
        The placeholder "$*" can be given (even multiple times) to specify
        where the arguments will be included, for example:
 :set makeprg=latex\ \\\\nonstopmode\ \\\\input\\{$*}
        When this option is set from a |modeline|, while the 'secure' option
        is set, you will get a warning message.


                                                *'matchpairs'* *'mps'*
'matchpairs' 'mps'     string  (default "(:),{:},[:]")
                        local to buffer
                        {not in Vi}
        Characters that form pairs.  The |%| command jumps from one to the
        other.  Currently only single character pairs are allowed, and they
        must be different.  The characters must be separated by a colon.  The
        pairs must be separated by a comma.  Example for including '<' and '>'
        (HTML):
 set mps+=<:>


                                                *'matchtime'* *'mat'*
'matchtime' 'mat'       number  (default 5)
                        global
                        {not in Vi}{in Nvi}
        Tenths of a second to show the matching paren, when 'showmatch' is
        set.  Note that this is not in milliseconds, like other options that
        set a time.  This is to be compatible with Nvi.


                                                *'maxfuncdepth'* *'mfd'*
'maxfuncdepth' 'mfd' number  (default 100)
                        global
                        {not in Vi}
        Maximum depth of function calls for user functions.  This normally
        catches endless recursion.  When using a recursive function with
        more depth, set 'maxfuncdepth' to a bigger number.  But this will use
        more memory, there is the danger of failing when memory is exhausted.
        See also |:function|.


                                                *'maxmapdepth'* *'mmd'*
'maxmapdepth' 'mmd'   number  (default 1000)
                        global
                        {not in Vi}
        Maximum number of times a mapping is done without resulting in a
        character to be used.  This normally catches endless mappings, like
        ":map x y" with ":map y x".  It still does not catch ":map g wg",
        because the 'w' is used before the next mapping is done.  See also
        |key-mapping|.


                                                *'maxmem'* *'mm'*
'maxmem' 'mm'               number  (default 512)
                        global
                        {not in Vi}
        Maximum amount of memory (in Kbyte) to use for one buffer.  When this
        limit is reached allocating extra memory for a buffer will cause
        other memory to be freed.  See also 'maxmemtot'.


                                                *'maxmemtot'* *'mmt'*
'maxmemtot' 'mmt'       number  (default 2048, or half the amount of memory
                                available)
                        global
                        {not in Vi}
        Maximum amount of memory (in Kbyte) to use for all buffers together.
        See also 'maxmem'.


                                   *'modeline'* *'ml'* *'nomodeline'* *'noml'*
'modeline' 'ml'           boolean  (Vim default: on, Vi default: off)
                        local to buffer

                                                *'modelines'* *'mls'*
'modelines' 'mls'       number  (default 5)
                        global
                        {not in Vi}
        If 'modeline' is on 'modelines' gives the number of lines that is
        checked for set commands.  If 'modeline' is off or 'modelines' is zero
        no lines are checked.  See |modeline|.  'modeline' is reset when
        'compatible' is set.


                                 *'modified'* *'mod'* *'nomodified'* *'nomod'*
'modified' 'mod' boolean  (default off)
                        local to buffer
                        {not in Vi}
        When on the buffer is considered to be modified.  This option is set
        by every command that makes a change to the buffer.  Only the undo
        command may reset it, when all changes have been undone.


                                                *'more'* *'nomore'*
'more'                    boolean  (Vim default: on, Vi default: off)
                        global
                        {not in Vi}
        When on, listings pause when the whole screen is filled.  You will get
        the |more-prompt|.  When this option is off there are no pauses, the
        listing continues until finished.
        When 'compatible' is set this option is reset.


                                                *'mouse'*
'mouse'                  string  (default "", "a" for GUI, MS-DOS and Win32)
                        global
                        {not in Vi}
        Enable the use of the mouse.  Only works for certain terminals
        (xterm, MS-DOS, Win32 |win32-mouse| and Linux console with gpm).  For
        using the mouse in the GUI, see |gui-mouse|.
        The mouse can be enabled for different modes:
                n  Normal mode
                v   Visual mode
                i   Insert mode
                c   Command-line mode
                h   all previous modes when editing a help file
                a       all previous modes
                r       for |hit-return| and |more-prompt| prompt
        Normally you would enable the mouse in all four modes with:
 :set mouse=a
        When the mouse is not enabled, the GUI will still use the mouse for
        modeless selection.  This doesn't move the text cursor.

        See |mouse-using|.  Also see |'clipboard'|.

        Note: When enabling the mouse in an xterm, GUI copy/paste will be used
        if there is access to an X-server.  The xterm copy/paste can still be
        used by keeping the shift key pressed.  The GUI copy/paste only works
        in Normal, Visual and Insert mode.  This setting is suggested to allow
        normal xterm selection in Command-line mode:
 :set mouse=nvi
        Also see the 'clipboard' option.


                        *'mousefocus'* *'mousef'* *'nomousefocus'* *'nomousef'*
'mousefocus' 'mousef'       boolean  (default off)
                        global
                        {not in Vi}
                        {only works in the GUI}
        The window that the mouse pointer is on is automatically activated.
        When changing the window layout or window focus in another way, the
        mouse pointer is moved to the window with keyboard focus.  Off is the
        default because it makes using the pull down menus a little goofy, as
        a pointer transit may activate a window unintentionally.


                        *'mousehide'* *'mh'* *'nomousehide'* *'nomh'*
'mousehide' 'mh' boolean  (default off)
                        global
                        {not in Vi}
                        {only works in the GUI}
        When on, the mouse pointer is hidden when characters are typed.
        The mouse pointer is restored when the mouse is moved.


                                                *'mousemodel'* *'mousem'*
'mousemodel' 'mousem'       string  (default "extend", "popup" for MS-DOS and Win32)
                        global
                        {not in Vi}
        Sets the model to use for the mouse.  The name mostly specifies what
        the right mouse button is used for:
           extend       Right mouse button extends a selection.  This works
                        like in an xterm.
           popup        Right mouse button pops up a menu.  The shifted left
                        mouse button extends a selection.  This works like
                        with Microsoft Windows
           popup_setpos Like "popup", but the cursor will be moved to the
                        position where the mouse was clicked, and thus the
                        selected operation will act upon the clicked object.
                        If clicking inside a selection, that selection will
                        be acted upon, ie. no cursor move.  This implies of
                        course, that right clicking outside a selection will
                        end Visual mode.
        Overview of what button does what for each model:
 mouse extend popup(_setpos) 
        left click          place cursor        place cursor
        left drag           start selection     start selection
        shift-left          search word          extend selection
        right click         extend selection    popup menu (place cursor)
        right drag          extend selection    -
        middle click        paste               paste

        In the "popup" model the right mouse button produces a pop-up menu.
        You need to define this first, see |popup-menu|.

        Note that you can further refine the meaning of buttons with mappings.
        See |gui-mouse-mapping|.  But mappings are NOT used for modeless
        selection (because that's handled in the GUI code directly).

        The 'mousemodel' option is set by the |:behave| command.


                                                *'mousetime'* *'mouset'*
'mousetime' 'mouset' number  (default 500)
                        global
                        {not in Vi}
        Only for GUI, MS-DOS, Win32 and Unix with xterm.  Defines the maximum
        time in msec between two mouse clicks for the second click to be
        recognized as a multi click.


                                                        *'nrformats'* *'nf'*
'nrformats' 'nf' string  (default "octal,hex")
                        local to buffer
                        {not in Vi}
        This defines what bases Vim will consider for numbers when using the
        CTRL-A and CTRL-X commands for adding to and subtracting from a number
        respectively; see |CTRL-A| for more info on these commands.
        If "octal" is included, numbers that start with a zero will be
        considered to be octal.  Example: Using CTRL-A on "007" results in
        "010".
        If "hex" is included, numbers starting with "0x" or "0X" will be
        considered to be hexadecimal.  Example: Using CTRL-X on "0x100"
        results in "0x0ff".
        Numbers which simply begin with a digit in the range 1-9 are always
        considered decimal.  This also happens for numbers that are not
        recognized as octal or hex.


                                *'number'* *'nu'* *'nonumber'* *'nonu'*
'number' 'nu'               boolean  (default off)
                        local to window
        Print the line number in front of each line.  Tip: If you don't like
        wrapping lines to mix with the line numbers, set the 'showbreak'
        option to eight spaces:
                :set showbreak=\ \ \ \ \ \ \ \ 


                                        *'osfiletype'* *'oft'*
'osfiletype' 'oft'     string (RISC OS default: "Text",
                                others default: "")
                        local to buffer
                        {not in Vi}
                        {only available when compiled with the |+osfiletype|
                        feature}
        Some operating systems store extra information about files besides
        name, datastamp and permissions.  This option contains the extra
        information, the nature of which will vary between systems.
        The value of this option is usually set when the file is loaded, and
        use to set the file type when file is written.
        It can affect the pattern matching of the automatic commands.
        |autocmd-osfiletypes|


                                                *'paragraphs'* *'para'*
'paragraphs' 'para'   string  (default "IPLPPPQPP LIpplpipbp")
                        global
        Specifies the nroff macros that separate paragraphs.  These are pairs
        of two letters (see |object-motions|).


                                                *'paste'* *'nopaste'*
'paste'                  boolean  (default off)
                        global
                        {not in Vi}
        Put Vim in Paste mode.  This is useful if you want to cut or copy
        some text from one window and paste it in Vim.  This will avoid
        unexpected effects.
        Setting this option is useful when using Vim in a terminal, where Vim
        cannot distinguish between typed text and pasted text.  In the GUI, Vim
        knows about pasting and will mostly do the right thing without 'paste'
        being set.
        When the 'paste' option is switched on (also when it was already on):
                - mapping in Insert mode and Command-line mode is disabled
                - abbreviations are disabled
                - 'textwidth' is set to 0
                - 'wrapmargin' is set to 0
                - 'autoindent' is reset
                - 'smartindent' is reset
                - 'cindent' is reset
                - 'softtabstop' is set to 0
                - 'lisp' is reset
                - 'revins' is reset
                - 'ruler' is reset
                - 'showmatch' is reset
                - 'formatoptions' is used like it is empty
        NOTE: When you start editing another file while the 'paste' option is
        on, settings from the modelines or autocommands may change the
        settings again, causing trouble when pasting text.  You might want to
        set the 'paste' option again.
        When the 'paste' option is reset the mentioned options are restored to
        the value before the moment 'paste' was switched from off to on.
        Resetting 'paste' before ever setting it does not have any effect.
        Since mapping doesn't work while 'paste' is active, you need to use
        the 'pastetoggle' option to toggle the 'paste' option with some key.


                                                *'pastetoggle'* *'pt'*
'pastetoggle' 'pt'     string  (default "")
                        global
                        {not in Vi}
        When non-empty, specifies the key sequence that toggles the 'paste'
        option.  This is like specifying a mapping:
 map {keys} :set invpaste<CR>
        Where {keys} is the value of 'pastetoggle'.
        The difference is that it will work even when 'paste' is set.
        'pastetoggle' works in Insert mode and Normal mode, but not in
        Command-line mode.
        Mappings are checked first, thus overrule 'pastetoggle'.  However,
        when 'paste' is on mappings are ignored in Insert mode, thus you can do
        this:
 map <F10> :set paste<CR>
 map <F11> :set nopaste<CR>
 imap <F10> <C-O>:set paste<CR>
 imap <F11> <nop>
 set pastetoggle=<F11>
        This will make <F10> start paste mode and <F11> stop paste mode.
        Note that typing <F10> in paste mode inserts "<F10>", since in paste
        mode everything is inserted literally, except the 'pasttoggle' key
        sequence.


                                                *'patchmode'* *'pm'*
'patchmode' 'pm' string  (default "")
                        global
                        {not in Vi}
        When non-empty the oldest version of a file is kept.  This can be used
        to keep the original version of a file if you are changing files in a
        source distribution.  Only the first time that a file is edited a copy
        of the original file will be kept.  The name of the copy is the name
        of the original file with the string in the 'patchmode' option
        appended.  This option should start with a dot.  Use a string like
        ".org".  'backupdir' must not be empty for this to work (Detail: The
        backup file is renamed to the patchmode file after the new file has
        been successfully written, that's why it must be possible to write a
        backup file).  If there was no file to be backed up, an empty file is
        created.


                                                *'path'* *'pa'*
'path' 'pa'           string  (default on Unix: ".,/usr/include,,"
                                   on OS/2:       ".,/emx/include,,"
                                   other systems: ".,,")
                        global
                        {not in Vi}
        This is a list of directories which will be searched when using the
        gf, [f, ]f, ^Wf and other commands, provided that the file being
        searched for has a relative path (not starting with '/').  The
        directories in the 'path' option may be relative or absolute.
        - Use commas to separate directory names:
                :set path=.,/usr/local/include,/usr/include
        - Spaces can also be used to separate directory names (for backwards
          compatibility with version 3.0).  To have a space in a directory
          name, precede it with an extra backslash, and escape the space:
                :set path=.,/dir/with\\\ space
        - To include a comma in a directory name precede it with an extra
          backslash:
                :set path=.,/dir/with\\,comma
        - To search relative to the directory where the current file is use
                :set path=.
        - To search in the current directory use an empty string between two
          commas:
                :set path=,,
        - A directory name may end in a ':' or '/'.
        - Environment variables are expanded |:set_env|.
        - Use wildcards to specify directories more freely, e.g.,
                :set path=/usr/include/*
          means all subdirectories below /usr/include (but not /usr/include
          itself).
        - Use '**' if you want the whole subtree to be searched:
                :set path=/home/user_x/src/**
          means search in the whole subtree under "/home/usr_x/src". (to avoid
          endless recursion, the depth is restricted to 100 levels)
        - Give wildcards and recursions in any order:
                :set path=/**/include/**
          specifies a path with at least one directory /include/ in it.
        - The set of allowed wildcards and the possible usage depend on the
          operating system, but /etc/*/etc and /etc/**/etc work on any
          system. |:_%<|
        - Careful with '\' characters, type two to get one in the option:
                :set path=.,c:\\include
          Or just use '/' instead:
                :set path=.,c:/include
        Don't forget "." or files won't even be found in the same directory as
        the file!
        The maximum length is limited.  How much depends on the system, mostly
        it is something like 256 or 1024 characters.
        You can check if all the include files are found, using the value of
        'path', see |:checkpath|.
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        directories from the list.  This avoids problems when a future version
        uses another default.  To remove the current directory use:
                :set path-=
        To add the current directory use:
                :set path+=
        To use an environment variable, you probably need to replace the
        separator.  Here is an example to append $INCL, in which directory
        names are separated with a semi-colon:
 let &path = &path . "," . substitute($INCL, ';', ',', 'g')
        Replace the ';' with a ':' or whatever separator is used.  Note that
        this doesn't work when $INCL contains a comma or white space.


                                    *'previewheight'* *'pvh'*
'previewheight' 'pvh'       number (default 12)
                        global
                        {not in Vi}
        Default height for a preview window.  Used for |:ptag| and associated
        commands.  Used for |CTRL-W_}| when no count is given.


                                   *'readonly'* *'ro'* *'noreadonly'* *'noro'*
'readonly' 'ro'           boolean  (default off)
                        local to buffer
                        {not in Vi}
        If on, writes fail unless you use a '!'.  Protects you from
        accidentally overwriting a file.  Default on when Vim is started
        in read-only mode ("vim -R") or when the executable is called "view".
        {not in Vi:}  When using the ":view" command the 'readonly' option is
        set for the newly edited buffer.  When using ":w!" the 'readonly'
        option is reset for the current buffer.


                                                *'remap'* *'noremap'*
'remap'                  boolean  (default on)
                        global
        Allows for mappings to work recursively.  If you do not want this for
        a single entry, use the :noremap[!] command.


                                                *'report'*
'report'                number  (default 2)
                        global
        Threshold for reporting number of lines changed.  When the number of
        changed lines is more than 'report' a message will be given for most
        ":" commands.  For the ":substitute" command the number of
        substitutions is used instead of the number of lines.


                         *'restorescreen'* *'rs'* *'norestorescreen'* *'nors'*
'restorescreen' 'rs' boolean  (default on)
                        global
                        {not in Vi}  {Windows 95/NT version only}
        When set, the screen contents is restored when exiting Vim.  This also
        happens when executing external commands.

        For non-Windows Vim: You can set or reset the 't_ti' and 't_te'
        options in your .vimrc.  To disable restoring:
                set t_ti= t_te=
        To enable restoring (for an xterm):
                set t_ti=^[7^[[r^[[?47h t_te=^[[?47l^[8
        (Where ^[ is an <Esc>, type CTRL-V <Esc> to insert it)


                                *'revins'* *'ri'* *'norevins'* *'nori'*
'revins' 'ri'               boolean  (default off)
                        global
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        Inserting characters in Insert mode will work backwards.  See "typing
        backwards" |ins-reverse|.  This option can be toggled with the CTRL-_
        command in Insert mode, when 'allowrevins' is set.  This option is
        reset when 'compatible' or 'paste' is set.


                                 *'rightleft'* *'rl'* *'norightleft'* *'norl'*
'rightleft' 'rl' boolean  (default off)
                        local to window
                        {not in Vi}
                        {only available when compiled with the |+rightleft|
                        feature}
        When on, display orientation becomes right-to-left, i.e., character
        that are stored in the file appear from the right to the left.  Using
        this option, it is possible to edit files for languages that are
        written from the right to the left such as Hebrew and Arabic.  This
        option is per window, so it is possible to edit mixed files
        simultaneously, or to view the same file in both ways (this is
        sometimes useful when editing Hebrew TeX--XeT files).  See
        |rightleft.txt|.


                                         *'ruler'* *'ru'* *'noruler'* *'noru'*
'ruler' 'ru'         boolean  (default off)
                        global
                        {not in Vi}
                        {not available when compiled without the
                        |+cmdline_info| feature}
        Show the line and column number of the cursor position, separated by a
        comma.  When there is room, the relative position of the displayed
        text in the file is shown on the far right:
                Top     first line is visible
                Bot     last line is visible
                All     first and last line are visible
                45% relative position in the file
        If 'rulerformat' is set, it will determine the contents of the ruler.
        Each window has its own ruler.  If a window has a status line, the
        ruler is shown there.  Otherwise it is shown in the last line of the
        screen.  If the statusline is given by 'statusline' (ie. not empty),
        this option takes precedence over 'ruler' and 'rulerformat'
        If there are characters in the line that take two positions on the
        screen, both the "real" column and the screen column are shown,
        separated with a dash.
        For an empty line "0-1" is shown.
        For an empty buffer the line number will also be zero: "0,0-1".
        This option is reset when the 'paste' option is set.
        If you don't want to see the ruler all the time but want to know where
        you are, use "g CTRL-G" |g_CTRL-G|.


                                                *'rulerformat'* *'ruf'*
'rulerformat' 'ruf'   string  (default empty)
                        global
                        {not in Vi}
                        {not available when compiled without the |+statusline|
                        feature}
        The format of this option, is like that of 'statusline'.  When it is
        not empty it determines the content of the ruler string.  If the
        option has a leading "%{wid}(", then {wid} determines the width of the
        ruler.  The default ruler width is 17 characters.


                                                *'scroll'* *'scr'*
'scroll' 'scr'             number  (default 'lines' / 2)
                        local to window
        Number of lines to scroll with CTRL-U and CTRL-D commands.  Will be
        set to half the number of lines in the window when the window size
        changes.  If you give a count to the CTRL-U or CTRL-D command it will
        be used as the new value for 'scroll'.  Reset to 'lines' / 2 with
        ":set scroll=0".   {Vi is a bit different: 'scroll' gives the number
        of screen lines instead of file lines, makes a difference when lines
        wrap}


                                                *'scrollbind'* *'scb'*
'scrollbind' 'scb'     boolean  (default off)
                        local to window
                        {not in Vi}
                        {not available when compiled without the |+scrollbind|
                        feature}
        See also |scroll-binding|.  When this option is set, the current
        window scrolls as other scrollbind windows (windows that also have
        this option set) scroll.  This option is useful for viewing the
        differences between two versions of a file.  See |'scrollopt'| for
        options that determine how this option should be interpreted.


                                                *'scrolljump'* *'sj'*
'scrolljump' 'sj'       number  (default 1)
                        global
                        {not in Vi}
        Minimal number of lines to scroll when the cursor gets off the
        screen (e.g., with "j").  Not used for scroll commands (e.g., CTRL-E,
        CTRL-D).  Useful if your terminal scrolls very slowly.


                                                *'scrolloff'* *'so'*
'scrolloff' 'so' number  (default 0)
                        global
                        {not in Vi}
        Minimal number of screen lines to keep above and below the cursor.
        This will make some context visible around where you are working.  If
        you set it to a very large value (999) the cursor line will always be
        in the middle of the window (except at the start or end of the file or
        when long lines wrap).


                                                *'scrollopt'* *'sbo'*
'scrollopt' 'sbo'       string  (default "ver,jump")
                        global
                        {not available when compiled without the |+scrollbind|
                        feature}
                        {not in Vi}
        This is a comma-separated list of words that specifies how
        'scrollbind' windows should behave.
        The following words are available:
            ver         Bind vertical scrolling for 'scrollbind' windows
            hor         Bind horizontal scrolling for 'scrollbind' windows
            jump        When switching between 'scrollbind' windows, make sure
                        that the relative vertical offset is valid for the new
                        window.  The relative offset is invalid whenever
                        another 'scrollbind' window has scrolled to a point
                        that would force the current window to scroll past the
                        beginning or end of its buffer.  When the resync is
                        performed, some of the other 'scrollbind' windows may
                        need to jump so that the current window's relative
                        position is visible on-screen.  If this jump is
                        undesirable, omit this word from 'scrollopt'


                                                *'sections'* *'sect'*
'sections' 'sect'               string  (default "SHNHH HUnhsh")
                        global
        Specifies the nroff macros that separate sections.  These are pairs of
        two letters (See |object-motions|).  The default makes a section start
        at the nroff macros ".SH", ".NH", ".H", ".HU", ".nh" and ".sh".


                                                *'secure'* *'nosecure'*
'secure'                boolean  (default off)
                        global
                        {not in Vi}
        When on, ":autocmd", shell and write commands are not allowed in
        ".vimrc" and ".exrc" in the current directory and map commands are
        displayed.  Switch it off only if you know that you will not run into
        problems, or when the 'exrc' option is off.  On Unix this option is
        only used if the ".vimrc" or ".exrc" is not owned by you.  This can be
        dangerous if the systems allows users to do a "chown".  You better set
        'secure' at the end of your ~/.vimrc then.
        This option cannot be set from a |modeline|.


                                                *'selection'* *'sel'*
'selection' 'sel'       string  (default "inclusive")
                        global
                        {not in Vi}
        This option defines the behavior of the selection.  It is only used
        in Visual and Select mode.
        Possible values:
 value past line inclusive 
           old             no           yes
           inclusive       yes          yes
           exclusive       yes          no
        "past line" means that the cursor is allowed to be positioned one
        character past the line.
        "inclusive" means that the last character of the selection is included
        in an operation.  For example, when "x" is used to delete the
        selection.

        The 'selection' option is set by the |:behave| command.


                                                *'selectmode'* *'slm'*
'selectmode' 'slm'     string  (default "")
                        global
                        {not in Vi}
        This is a comma separated list of words, which specifies when to start
        Select mode instead of Visual mode, when a selection is started.
        Possible values:
           mouse        when using the mouse
           key          when using shifted special keys
           cmd          when using "v", "V" or CTRL-V
        See |Select-mode|.
        The 'selectmode' option is set by the |:behave| command.


                                                *'sessionoptions'* *'ssop'*
'sessionoptions' 'ssop'   string  (default "buffers,winsize,options,help,blank")
                        global
                        {not in Vi}
        Changes the effect of the |:mksession| command.  It is a comma
        separated list of words.  Each word enables saving and restoring
        something:
 word save and restore 
           buffers   hidden and unloaded buffers, not just those in windows
           globals      global variables that start with an uppercase letter
                        and contain at least one lowercase letter.
           help         the help window
           blank        empty windows
           options       options and mappings
           winpos       position of the GUI vim window
           resize       size of the screen: 'lines' and 'columns'
           winsize      window sizes (where possible)
           slash        backslashes in file names replaced with forward
                        slashes
           unix         with Unix end-of-line format (single <NL>), even when
                        on Windows or DOS

        "slash" and "unix" are useful on Windows when sharing session files
        with Unix.  The Unix version of Vim cannot source dos format scripts,
        but the Windows version of Vim can source unix format scripts.


                                                *'shell'* *'sh'*
'shell' 'sh'         string  (default $SHELL or "sh",
                                        MS-DOS and Win32: "command",
                                        OS/2: "cmd")
                        global
        Name of the shell to use for ! and :! commands.  When changing the
        value also check the 'shelltype', 'shellpipe', 'shellslash' and
        'shellredir' options.
        It is allowed to give an argument to the command, e.g.  "csh -f".
        See |option-backslash| about including spaces and backslashes.
        Environment variables are expanded |:set_env|.
        For Dos 32 bits (DJGPP), you can set the $DJSYSFLAGS environment
        variable to change the way external commands are executed.  See the
        libc.inf file of DJGPP.
        If the name of the shell contains a space, you might need to enclose
        it in quotes.  Example:
 :set shell=\"c:\program\ files\unix\sh.exe\"\ -f
        Note the backslash before each quote (to avoid starting a comment) and
        each space (to avoid ending the option value).  Also note that the
        "-f" is not inside the quotes, because it is not part of the command
        name.  And Vim automagically recognizes the backslashes that are path
        separators.
        This option cannot be set from a |modeline|.


                                                *'shellcmdflag'* *'shcf'*
'shellcmdflag' 'shcf'       string  (default: "-c", MS-DOS and Win32, when 'shell'
                                        does not contain "sh" somewhere: "/c")
                        global
                        {not in Vi}
        Flag passed to the shell to execute "!" and ":!" commands; e.g.,
        "bash.exe -c ls" or "command.com /c dir".  For the MS-DOS-like
        systems, the default is set according to the value of 'shell', to
        reduce the need to set this option by the user.  It's not used for
        OS/2 (EMX figures this out itself).  See |option-backslash| about
        including spaces and backslashes.  See |dos-shell|.
        This option cannot be set from a |modeline|.


                                                *'shellpipe'* *'sp'*
'shellpipe' 'sp'        string  (default ">", "| tee", "|& tee" or "2>&1| tee")|||
                        global
                        {not in Vi}
                        {not available when compiled without the |+quickfix|
                        feature}
        String to be used to put the output of the ":make" command in the
        error file.  See also |:make_makeprg|.  See |option-backslash| about
        including spaces and backslashes.
        For the Amiga and MS-DOS the default is ">".  The output is directly
        saved in a file and not echoed to the screen.
        For Unix the default it "| tee".  The stdout of the compiler is saved
        in a file and echoed to the screen.  If the 'shell' option is "csh" or
        "tcsh" after initializations, the default becomes "|& tee".  If the
        'shell' option is "sh", "ksh", "zsh" or "bash" the default becomes
        "2>&1| tee".  This means that stderr is also included.
        The initialization of this option is done after reading the ".vimrc"
        and the other initializations, so that when the 'shell' option is set
        there, the 'shellpipe' option changes automatically, unless it was
        explicitly set before.
        When 'shellpipe' is set to an empty string, no redirection of the
        ":make" output will be done.  This is useful if you use a 'makeprg'
        that writes to 'makeef' by itself.  If you want no piping, but do
        want to include the 'makeef', set 'shellpipe' to a single space.
        Don't forget to precede the space with a backslash: ":set sp=\ ".
        In the future pipes may be used for filtering and this option will
        become obsolete (at least for Unix).
        This option cannot be set from a |modeline|.


                                                *'shellquote'* *'shq'*
'shellquote' 'shq'     string  (default: ""; MS-DOS and Win32, when 'shell'
                                        contains "sh" somewhere: "\"")
                        global
                        {not in Vi}
        Quoting character(s), put around the command passed to the shell, for
        the "!" and ":!" commands.  The redirection is kept outside of the
        quoting.  See 'shellxquote' to include the redirection.  It's
        probably not useful to set both options.
        This is an empty string by default.  Only known to be useful for
        third-party shells on MS-DOS-like systems, such as the MKS Korn Shell
        or bash, where it should be "\"".  The default is adjusted according
        the value of 'shell', to reduce the need to set this option by the
        user.  See |dos-shell|.
        This option cannot be set from a |modeline|.


                                                *'shellredir'* *'srr'*
'shellredir' 'srr'     string  (default ">", ">&" or ">%s 2>&1")
                        global
                        {not in Vi}
        String to be used to put the output of a filter command in a temporary
        file.  See also |:!|.  See |option-backslash| about including spaces
        and backslashes.
        The name of the temporary file can be represented by "%s" if necessary
        (the file name is appended automatically if no %s appears in the value
        of this option).
        The default is ">".  For Unix, if the 'shell' option is "csh", "tcsh"
        or "zsh" during initializations, the default becomes ">&".  If the
        'shell' option is "sh", "ksh" or "bash" the default becomes
        ">%s 2>&1".  This means that stderr is also included.
        The initialization of this option is done after reading the ".vimrc"
        and the other initializations, so that when the 'shell' option is set
        there, the 'shellredir' option changes automatically unless it was
        explicitly set before.
        In the future pipes may be used for filtering and this option will
        become obsolete (at least for Unix).
        This option cannot be set from a |modeline|.


                        *'shellslash'* *'ssl'* *'noshellslash'* *'nossl'*
'shellslash' 'ssl'     boolean  (default off)
                        global
                        {not in Vi} {only for MSDOS, MS-Windows and OS/2}
        When set, a forward slash is used when expanding file names.  This is
        useful when a Unix-like shell is used instead of command.com or
        cmd.exe.  Backward slashes can still be typed, but they are changed to
        forward slashes by Vim.


                                                *'shelltype'* *'st'*
'shelltype' 'st' number  (default 0)
                        global
                        {not in Vi} {only for the Amiga}
        On the Amiga this option influences the way how the commands work
        which use a shell.
        0 and 1: always use the shell
        2 and 3: use the shell only to filter lines
        4 and 5: use shell only for ':sh' command
        When not using the shell, the command is executed directly.

        0 and 2: use "shell 'shellcmdflag' cmd" to start external commands
        1 and 3: use "shell cmd" to start external commands


                                                *'shellxquote'* *'sxq'*
'shellxquote' 'sxq'   string  (default: "";
                                        for Win32, when 'shell' contains "sh"
                                        somewhere: "\""
                                        for Unix, when using system(): "\"")
                        global
                        {not in Vi}
        Quoting character(s), put around the command passed to the shell, for
        the "!" and ":!" commands.  Includes the redirection.  See
        'shellquote' to exclude the redirection.  It's probably not useful
        to set both options.
        This is an empty string by default.  Known to be useful for
        third-party shells when using the Win32 version, such as the MKS Korn
        Shell or bash, where it should be "\"".  The default is adjusted
        according the value of 'shell', to reduce the need to set this option
        by the user.  See |dos-shell|.
        This option cannot be set from a |modeline|.


                        *'shiftround'* *'sr'* *'noshiftround'* *'nosr'*
'shiftround' 'sr'       boolean  (default off)
                        global
                        {not in Vi}
        Round indent to multiple of 'shiftwidth'.  Applies to > and <
        commands.  CTRL-T and CTRL-D in Insert mode always round the indent to
        a multiple of 'shiftwidth' (this is Vi compatible).


                                                *'shiftwidth'* *'sw'*
'shiftwidth' 'sw'       number  (default 8)
                        local to buffer
        Number of spaces to use for each step of (auto)indent.


                                                *'shortmess'* *'shm'*
'shortmess' 'shm'       string  (Vim default "filnxtToO", Vi default: "")
                        global
                        {not in Vi}
        This option helps to avoid all the |hit-return| prompts caused by file
        messages, for example  with CTRL-G, and to avoid some other messages.
        It is a list of flags:
 flag meaning when present 
          f use "(3 of 5)" instead of "(file 3 of 5)"
          i use "[noeol]" instead of "[Incomplete last line]"
          l use "999L, 888C" instead of "999 lines, 888 characters"
          m use "[+]" instead of "[Modified]"
          n        use "[New]" instead of "[New File]"
          r use "[RO]" instead of "[readonly]"
          w use "[w]" instead of "written" for file write message.
          x use "[dos]" instead of "[dos format]", "[unix]" instead of
                "[unix format]" and "[mac]" instead of "[mac format]".
          a     all of the above abbreviations

          o overwrite message for writing a file with subsequent message
                for reading a file (useful for ":wn" or when 'autowrite' on)
          O message for reading a file overwrites any previous message.
                Also for quickfix message (e.g., ":cn").
          s don't give "search hit BOTTOM, continuing at TOP" or "search
                hit TOP, continuing at BOTTOM" messages
          t     truncate file message at the start if it is too long to fit
                on the command-line, "<" will appear in the left most column.
                Ignored in Ex mode.
          T truncate other messages in the middle if they are too long to
                fit on the command line. "..." will appear in the middle.
                Ignored in Ex mode.
          W don't give "written" or "[w]" when writing a file
          A     don't give the "ATTENTION" message when an existing swap file
                is found.
          I     don't give the intro message when starting Vim |:intro|.

        This gives you the opportunity to avoid that a change between buffers
        requires you to hit return, but still gives as useful a message as
        possible for the space available.  To get the whole message that you
        would have got with 'shm' empty, use ":file!"
        Useful values:
            shm=        No abbreviation of message.
            shm=a       Abbreviation, but no loss of information.
            shm=at      Abbreviation, and truncate message when necessary.


                                 *'shortname'* *'sn'* *'noshortname'* *'nosn'*
'shortname' 'sn' boolean  (default off)
                        local to buffer
                        {not in Vi, not in MS-DOS versions}
        Filenames are assumed to be 8 characters plus one extension of 3
        characters.  Multiple dots in file names are not allowed.  When this
        option is on, dots in file names are replaced with underscores when
        adding an extension (".~" or ".swp").  This option is not available
        for MS-DOS, because then it would always be on.  This option is useful
        when editing files on an MS-DOS compatible filesystem, e.g., messydos
        or crossdos.  When running the Win32 GUI version under Win32s, this
        option is always on by default.


                                                *'showbreak'* *'sbr'*
'showbreak' 'sbr'       string  (default "")
                        global
                        {not in Vi}
                        {not available when compiled without the  |+linebreak|
                        feature}
        String to put at the start of lines that have been wrapped.  Useful
        values are "> " or "+++ ".  Only printable characters are allowed,
        excluding <Tab> and comma (in a future version the comma might be used
        to separate the part that is shown at the end and at the start of a
        line).  The characters are highlighted according to the '@' flag in
        'highlight'.


                                     *'showcmd'* *'sc'* *'noshowcmd'* *'nosc'*
'showcmd' 'sc'             boolean  (Vim default: on, off for Unix, Vi default:
                                 off)
                        global
                        {not in Vi}
                        {not available when compiled without the
                        |+cmdline_info| feature}
        Show (partial) command in status line.  Set this option off if your
        terminal is slow.


                                                *'showfulltag'* *'sft'*
'showfulltag' 'sft'   boolean (default off)
                        global
                        {not in Vi}
        When completing a word in insert mode (see |ins-completion|) from the
        tags file, show both the tag name and a tidied-up form of the search
        pattern (if there is one) as possible matches.  Thus, if you have
        matched a C function, you can see a template for what arguments are
        required (coding style permitting).


                                 *'showmatch'* *'sm'* *'noshowmatch'* *'nosm'*
'showmatch' 'sm' boolean  (default off)
                        global
        When a bracket is inserted, briefly jump to the matching one.  The
        jump is only done if the match can be seen on the screen.  The time to
        show the match can be set with 'matchtime'.
        A Beep is given if there is no match (no matter if the match can be
        seen or not).  This option is reset when the 'paste' option is set.
        When the 'm' flag is not included in 'cpoptions', typing a character
        will immediately move the cursor back to where it belongs.
        See the "sm" field in 'guicursor' for setting the cursor shape and
        blinking when showing the match.
        Note: For the use of the short form parental guidance is advised.


                                 *'showmode'* *'smd'* *'noshowmode'* *'nosmd'*
'showmode' 'smd' boolean  (Vim default: on, Vi default: off)
                        global
        If in Insert, Replace or Visual mode put a message on the last line.
        Use the 'M' flag in 'highlight' to set the type of highlighting for
        this message.


                                                *'sidescroll'* *'ss'*
'sidescroll' 'ss'       number  (default 0)
                        global
                        {not in Vi}
        The minimal number of columns to scroll horizontally.  Used only when
        the 'wrap' option is off and the cursor is moved off of the screen.
        When it is zero the cursor will be put in the middle of the screen.
        When using a slow terminal set it to a large number or 0.  When using
        a fast terminal use a small number or 1.  Not used for "zh" and "zl"
        commands.


                        *'smartcase'* *'scs'* *'nosmartcase'* *'noscs'*
'smartcase' 'scs'       boolean  (default off)
                        global
                        {not in Vi}
        Override the 'ignorecase' option if the search pattern contains upper
        case characters.  Only used when the search pattern is typed and
        'ignorecase' option is on.  Used for the commands "/", "?", "n", "N",
        ":g" and ":s".  Not used for "*", "#", "gd", tag search, etc..  After
        "*" and "#" you can make 'smartcase' used by doing a "/" command,
        recalling the search pattern from history and hitting return.


                             *'smartindent'* *'si'* *'nosmartindent'* *'nosi'*
'smartindent' 'si'     boolean  (default off)
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the
                        |+smartindent| feature}
        Do smart autoindenting when starting a new line.  Works for C-like
        programs, but can also be used for other languages.  'cindent' does
        something like this, works better in most cases, but is more strict,
        see |C-indenting|.  When 'cindent' is on, setting 'si' has no effect.
        Normally 'autoindent' should also be on when using 'smartindent'.
        An indent is automatically inserted:
        - After a line ending in '{'.
        - After a line starting with a keyword from 'cinwords'.
        - Before a line starting with '}' (only with the "O" command).
        When typing '}' as the first character in a new line, that line is
        given the same indent as the matching '{'.
        When typing '#' as the first character in a new line, the indent for
        that line is removed, the '#' is put in the first column.  The indent
        is restored for the next line.  If you don't want this, use this
        mapping: ":inoremap # X^H#", where ^H is entered with CTRL-V CTRL-H.
        When using the ">>" command, lines starting with '#' are not shifted
        right.
        'smartindent' is reset when the 'paste' option is set.


                                 *'smarttab'* *'sta'* *'nosmarttab'* *'nosta'*
'smarttab' 'sta' boolean  (default off)
                        global
                        {not in Vi}
        When on, a <Tab> in front of a line inserts blanks according to
        'shiftwidth'.  'tabstop' is used in other places.
        When off a <Tab> always inserts blanks according to 'tabstop'.
        'shiftwidth' is only used for shifting text left or right
        |shift-left-right|.
        What gets inserted (a Tab or spaces) depends on the 'expandtab'
        option.  Also see |ins-expandtab|.  When 'expandtab' is not set, the
        number of spaces minimized by using <Tab>s.


                                        *'softtabstop'* *'sts'*
'softtabstop' 'sts'   number  (default 0)
                        local to buffer
                        {not in Vi}
        Number of spaces that a <Tab> counts for while performing editing
        operations, like inserting a <Tab> or using <BS>.  It "feels" like
        <Tab>s are being inserted, while in fact a mix of spaces and <Tab>s is
        used.  This is useful to keep the 'ts' setting at its standard value
        of 8, while being able to edit like it is set to 'sts'.  However,
        commands like "x" still work on the actual characters.
        When 'sts' is zero, this feature is off.
        'softtabstop' is set to 0 when the 'paste' option is set.
        See also |ins-expandtab|.  When 'expandtab' is not set, the number of
        spaces minimized by using <Tab>s.


                        *'splitbelow'* *'sb'* *'nosplitbelow'* *'nosb'*
'splitbelow' 'sb'       boolean  (default off)
                        global
                        {not in Vi}
        When on, splitting a window will put the new window below the current
        one.


                           *'startofline'* *'sol'* *'nostartofline'* *'nosol'*
'startofline' 'sol'   boolean  (default on)
                        global
                        {not in Vi}
        When on the commands listed below move the cursor to the first
        blank of the line.  When off the cursor is kept in the same column
        (if possible).  This applies to the commands: CTRL-D, CTRL-U, CTRL-B,
        CTRL-F, "G", "H", "M", "L", , and to the commands "d", "<<" and ">>"
        with a linewise operator, with "%" with a count and to buffer changing
        commands (CTRL-^, :bnext, :bNext, etc.).  Also for an Ex command that
        only has a line number, e.g., ":25" or ":+".
        In case of buffer changing commands the cursor is placed at the column
        where it was the last time the buffer was edited.
        This option is set when the 'compatible' option is set.


                           *'statusline'* *'stl'*
'statusline' 'stl'     string  (default empty)
                        global
                        {not in Vi}
                        {not available when compiled without the |+statusline|
                        feature}
        When nonempty, this option determines the content of the status line.
        The option consists of printf style '%' items interspersed with
        normal text.  Each status line item is of the form:
          %-0{minwid}.{maxwid}{item}
        All fields except the {item} is optional.  A single percent sign can
        be given as "%%".

        Note that the only effect of 'ruler' when this option is set (and
        'laststatus' is 2) is controlling the output of |CTRL-G|.

 field meaning 
        -           Left justify the item. The default is right justified
                    when minwid is larger than the length of the item.
        0           Leading zeroes in numeric items. Overridden by '-'.
        minwid      Minimum width of the item, padding as set by '-' & '0'.
        maxwid      Maximum width of the item.  Truncation occurs with a '<'
                    on the left for text items.  Numeric items will be
                    shifted down to maxwid-2 digits followed by '>'number
                    where number is the amount of missing digits, much like
                    an exponential notation.
        item        A one letter code as described below.

        Following is a description of the possible statusline items.  The
        second character in "item" is the type: N for number, S for string
        and F for flags as described below.  A - is used if not applicable.

 item meaning 
        f S   Path to the file in the buffer, relative to current directory.
        F S   Full path to the file in the buffer.
        t S   File name (tail) of file in the buffer.
        m F   Modified flag, text is " [+].
        M F   Modified flag, text is ",+".
        r F   Readonly flag, text is " [RO]".
        R F   Readonly flag, text is ",RO".
        h F   Help buffer flag, text is " [help]".
        H F   Help buffer flag, text is ",HLP".
        w F   Preview window flag, text is " [Preview]".
        W F   Preview window flag, text is ",PRV".
        y F   Type of file in the buffer, e.g., " [vim]".  See 'filetype'.
        Y F   Type of file in the buffer, e.g., ",VIM".  See 'filetype'.
        n N   Buffer number.
        b N   Value of byte under cursor.
        B N   As above, in hexadecimal.
        o N   Byte number in file of byte under cursor, first byte is 1.
              Mnemonic: Offset from start of file (with one added)
        O N   As above, in hexadecimal.
        l N   Line number.
        L N   Number of lines in buffer.
        c N   Column number.
        v N   Virtual column number.
        V N   Virtual column number as -{num}.  Not displayed if equal to 'c'.
        p N   Percentage through file in lines as in |CTRL-G|.
        P S   Percentage through file of displayed window.  This is like the
              percentage described for 'ruler'.  Always 3 in length.
        a S   Argument list status as in default title. ({current} of {max})
              Empty if the argument file count is zero or one.
        { NF  Evaluate expression between '{' and '}' and substitute result.
        ( -   Start of item group.  Can be used for setting the width and
              alignment of a section.
        ) -   End of item group.  No width fields allowed.
        < -   Where to truncate line if too long.  Default is at the start.
              No width fields allowed.
        = -   Separation point between left and right aligned items.
              No width fields allowed.
        * -   Set highlight group to User{N}, where {N} is taken from the
              minwid field. eg. %1*.  Restore normal highlight with %* or %0*.
              The difference between User{N} and StatusLine  will be applied
              to StatusLineNC for the statusline of non-current windows.
              The number N must be between 1 and 9.  See |hl-User1..9|

        Display of flags are controlled by the following heuristic:
        If a flag text starts with comma it is assumed that it wants to
        separate itself from anything but preceding plaintext.  If it starts
        with a space it is assumed that it wants to separate itself from
        anything but other flags.  That is: A leading comma is removed if the
        preceding character stems from plaintext.  A leading space is removed
        if the preceding character stems from another active flag. This will
        make a nice display when flags are used like in the examples below.

        When all items in a group becomes an empty string (ie. flags that are
        not set) and a minwid is not set for the group, the whole group will
        become empty.  This will make a group like the following disappear
        completely from the statusline when none of the flags are set.
 set statusline=...%(\ [%M%R%H]%)...

        Beware that an expression is evaluated each and every time the status
        line is displayed.  The current buffer and current window will be set
        temporarily to that of the window (and buffer) whose statusline is
        currently being drawn. The expression will evaluate in this context.
        The variable "actual_curbuf" is set to the 'bufnr()' number of the
        real current buffer.

        A result of all digits is regarded a number for display purposes.
        Otherwise the result is taken as flag text and applied to the rules
        described above.

        Watch out for errors in expressions.  They may render vim unusable !
        If you are stuck, hold down ':' or 'Q' to get a prompt, then quit and
        edit your .vimrc or whatever with "vim -u NONE" to get it right.

        Example: Display byte count and byte value, modified flag in red.
 set statusline=%<%f%=\ [%1*%M%*%n%R%H]\ %-19(%3l,%02c%03V%)%O'%02b'
 hi User1 term=inverse,bold cterm=inverse,bold ctermfg=red
        Example: Emulate standard status line with 'ruler' set
 set statusline=%<%f%h%m%r%=%l,%c%V\ %P
        Example: Display a ,GZ flag if a compressed file is loaded
 set statusline=...%r%{VarExists('b:gzflag','\ [GZ]')}%h...
          In the |:autocmd|'s:   |let b:gzflag = 1   And: |unlet b:gzflag|||
 function VarExists(var, val)
 if exists(a:var) | return a:val | else | return '' | endif
 endfunction


                                                *'suffixes'* *'su'*
'suffixes' 'su'           string  (default ".bak,~,.o,.h,.info,.swp,.obj")
                        global
                        {not in Vi}
        Files with these suffixes get a lower priority when multiple files
        match a wildcard.  See |suffixes|.  Commas can be used to separate the
        suffixes.  Spaces after the comma are ignored.  A dot is also seen as
        the start of a suffix.  To include a dot or comma in a suffix, precede
        it with a backslash (see |option-backslash| about including spaces and
        backslashes).
        See 'wildignore' for completely ignoring files.
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        suffixes from the list.  This avoids problems when a future version
        uses another default.


                                *'swapfile'* *'swf'* *'noswapfile'* *'noswf'*
'swapfile' 'swf' boolean (default on)
                        local to buffer
                        {not in Vi}
        Use a swapfile for the buffer.  This option can be reset when a
        swapfile is not wanted for a specific buffer.  For example, with
        confidential information that even root must not be able to access.
        Careful: All text will be in memory.  Don't use this for big files.
        Recovery will be impossible!
        A swapfile will only be present when |'updatecount'| is non-zero and
        'swapfile' is set.
        When 'swapfile' is reset, the swap file for the current buffer is
        immediately deleted.  When 'swapfile' is set, and 'updatecount' is
        non-zero, a swap file is immediately created.


                                                *'swapsync'* *'sws'*
'swapsync' 'sws' string  (default "fsync")
                        global
                        {not in Vi}
        When this option is not empty a swap file is synced to disk after
        writing to it.  This takes some time, especially on busy unix systems.
        When this option is empty parts of the swap file may be in memory and
        not written to disk.  When the system crashes you may lose more work.
        On Unix the system does a sync now and then without Vim asking for it,
        so the disadvantage of setting this option off is small.  On some
        systems the swap file will not be written at all.  For a unix system
        setting it to "sync" will use the sync() call instead of the default
        fsync(), which may work better on some systems.


                                                *'switchbuf'* *'swb'*
'switchbuf' 'swb'       string  (default "")
                        global
                        {not in Vi}
        This option controls the behavior when switching between buffers.
        Possible values (comma separated list):
           useopen      If included, jump to the first open window that
                        contains the specified buffer (if there is one).
                        Otherwise: Do not examine other windows.
                        This setting is checked in |quickfix| mode when
                        jumping to errors (":cc", ":cn", "cp", etc.).  It
                        is also used in all buffer related split commands,
                        for example ":sbuffer", ":sbnext", or ":sbrewind".
           split        If included, split the current window before loading
                        a buffer. Otherwise: do not split, use current window.
                        Supported in |quickfix| commands that display errors.


                                                *'syntax'* *'syn'*
'syntax' 'syn'             string  (default emtpy)
                        local to buffer
                        {not in Vi}
                        {not available when compiled without the |+syntax|
                        feature}
        When this option is set, the syntax with this name is loaded, unless
        syntax highlighting has been switched off with ":syntax off".
        Otherwise this option does not always reflect the current syntax (the
        b:current_syntax variable does).
        This option is most useful in a modeline, for a file which syntax is
        not automatically recognized.  Example, for in an IDL file:
 /* vim: set syntax=idl : */
        To switch off syntax highlighting for the current file, use:
 :set syntax=OFF
        To switch syntax highlighting on according to the current value of the
        'filetype' option:
 :set syntax=ON
        What actually happens when setting the 'syntax' option is that the
        Syntax autocommand event is triggered with the value as argument.
        This option is not copied to another buffer, independent of the 's' or
        'S' flag in 'cpoptions'.


                                        *'tabstop'* *'ts'*
'tabstop' 'ts'             number  (default 8)
                        local to buffer
        Number of spaces that a <Tab> in the file counts for.  Also see
        |:retab| command, and 'softtabstop' option.


                        *'tagbsearch'* *'tbs'* *'notagbsearch'* *'notbs'*
'tagbsearch' 'tbs'     boolean  (default on)
                        global
                        {not in Vi}
        When searching for a tag (e.g., for the |:ta| command), Vim can either
        use a binary search or a linear search in a tags file.  Binary
        searching makes searching for a tag a LOT faster, but a linear search
        will find more tags if the tags file wasn't properly sorted.
        Vim normally assumes that your tags files are sorted, or indicate that
        they are not sorted.  Only when this is not the case does the
        'tagbsearch' option need to be switched off.

        When 'tagbsearch' is on, binary searching is first used in the tags
        files.  In certain situations, Vim will do a linear search instead for
        certain files, or retry all files with a linear search.  When
        'tagbsearch' is off, only a linear search is done.

        Linear searching is done anyway, for one file, when Vim finds a line
        at the start of the file indicating that it's not sorted:
 !_TAG_FILE_SORTED 0 /some command/
        [The whitespace before and after the '0' must be a single <Tab>]

        When a binary search was done and no match was found in any of the
        files listed in 'tags', and 'ignorecase' is set or a pattern is used
        instead of a normal tag name, a retry is done with a linear search.
        Tags in unsorted tags files, and matches with different case will only
        be found in the retry.

        When 'tagbsearch' is off, tags searching is slower when a full match
        exists, but faster when no full match exists.  Tags in unsorted tags
        files may only be found with 'tagbsearch' off.
        When the tags file is not sorted, or sorted in a wrong way (not on
        ASCII byte value), 'tagbsearch' should be off, or the line given above
        must be included in the tags file.
        This option doesn't affect commands that find all matching tags (e.g.,
        command-line completion and ":help").
        {Vi: always uses binary search in some versions}


                                                *'taglength'* *'tl'*
'taglength' 'tl' number  (default 0)
                        global
        If non-zero, tags are significant up to this number of characters.


                        *'tagrelative'* *'tr'* *'notagrelative'* *'notr'*
'tagrelative' 'tr'     boolean  (Vim default: on, Vi default: off)
                        global
                        {not in Vi}
        If on and using a tag file in another directory, file names in that
        tag file are relative to the directory where the tag file is.  When
        the 'compatible' option is set, this option is reset.


                                                *'tags'* *'tag'*
'tags' 'tag'         string  (default "./tags,tags", when compiled with
                                |+emacs_tags|: "./tags,./TAGS,tags,TAGS")
                        global
        Filenames for the tag command, separated by spaces or commas.  To
        include a space or comma in a file name, precede it with a backslash
        (see |option-backslash| about including spaces and backslashes).
        When a file name starts with "./", the '.' is replaced with the path
        of the current file.  But only when the 'd' flag is not included in
        'cpoptions'.  Environment variables are expanded |:set_env|.  Also see
        |tags-option|.
        If Vim was compiled with the |+emacs_tags| feature, Emacs-style tag
        files are also supported.  They are automatically recognized.  The
        default value becomes "./tags,./TAGS,tags,TAGS".  |emacs-tags|
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        file names from the list.  This avoids problems when a future version
        uses another default.
        {Vi: default is "tags /usr/lib/tags"}


                                *'tagstack'* *'tgst'* *'notagstack'* *'notgst'*
'tagstack' 'tgst'       boolean  (default on)
                        global
                        {not in all versions of Vi}
        When on, the |tagstack| is used normally.  When off, a ":tag" or
        ":tselect" command with an argument will not push the tag onto the
        tagstack.  A following ":tag" without an argument, a ":pop" command or
        any other command that uses the tagstack will use the unmodified
        tagstack, but does change the pointer to the active entry.
        Resetting this option is useful when using a ":tag" command in a
        mapping which should not change the tagstack.


                                                *'term'*
'term'                    string  (default is $TERM, if that fails:
                                      in the GUI: "builtin_gui"
                                        on Amiga: "amiga"
                                         on BeOS: "beos-ansi"
                                          on Mac: "mac-ansi"
                                         on MiNT: "vt52"
                                       on MS-DOS: "pcterm"
                                         on OS/2: "os2ansi"
                                         on Unix: "ansi"
                                          on VMS: "ansi"
                                       on Win 32: "win32")
                        global
        Name of the terminal.  Used for choosing the terminal control
        characters.  Environment variables are expanded |:set_env|.
        For example:
 :set term=$TERM
        See |termcap|.


                                                *'terse'* *'noterse'*
'terse'                  boolean  (default off)
                        global
                        {not in Vi}
        When set: Add 's' flag to 'shortmess' option (this makes the message
        for a search that hits the start or end of the file not being
        displayed).  When reset: Remove 's' flag from 'shortmess' option.  {Vi
        shortens a lot of messages}


                                   *'textauto'* *'ta'* *'notextauto'* *'nota'*
'textauto' 'ta'           boolean  (Vim default: on, Vi default: off)
                        global
                        {not in Vi}
        This option is obsolete.  Use 'fileformats'.
        For backwards compatibility, when 'textauto' is set, 'fileformats' is
        set to the default value for the current system.  When 'textauto' is
        reset, 'fileformats' is made empty.


                                   *'textmode'* *'tx'* *'notextmode'* *'notx'*
'textmode' 'tx'           boolean  (MS-DOS, Win32 and OS/2: default on,
                                 others: default off)
                        local to buffer
                        {not in Vi}
        This option is obsolete.  Use 'fileformat'.
        For backwards compatibility, when 'textmode' is set, 'fileformat' is
        set to "dos".  When 'textmode' is reset, 'fileformat' is set to
        "unix".


                                                *'textwidth'* *'tw'*
'textwidth' 'tw' number  (default 0)
                        local to buffer
                        {not in Vi}
        Maximum width of text that is being inserted.  A longer line will be
        broken after white space to get this width.  A zero value disables
        this.  'textwidth' is set to 0 when the 'paste' option is set.  When
        'textwidth' is zero, 'wrapmargin' may be used.  See also
        'formatoptions' and |ins-textwidth|.


                             *'tildeop'* *'top'* *'notildeop'* *'notop'*
'tildeop' 'top'           boolean  (default off)
                        global
                        {not in Vi}
        When on: The tilde command "~" behaves like an operator.


                                *'timeout'* *'to'* *'notimeout'* *'noto'*
'timeout' 'to'             boolean (default on)
                        global

                                                *'ttimeout'* *'nottimeout'*
'ttimeout'            boolean (default off)
                        global
                        {not in Vi}
        These two options together determine the behavior when part of a
        mapped key sequence or keyboard code has been received:

 timeout ttimeout action 
        off             off             no time out
        on              on or off       time out on :mappings and key codes
        off             on              time out on key codes

        If there is no time out, Vim will wait until either the complete
        mapping or key sequence has been received, or it is clear that there
        is no mapping or key sequence for the received characters.  For
        example: if you have mapped "vl" and Vim has received 'v', the next
        character is needed to see if the 'v' is followed by an 'l'.  With a
        time out Vim will wait for about 1 second for the next character to
        arrive.  After that the already received characters are interpreted
        as single characters.  The waiting time can be changed with the
        'timeoutlen' option.
        On slow terminals or very busy systems time out may cause
        malfunctioning cursor keys.  If both options are off, Vim waits
        forever after an entered <Esc> if there are key codes that start
        with <Esc>.  You will have to type <Esc> twice.  If you do not have
        problems with key codes, but would like to have :mapped key
        sequences not time out in 1 second, set the ttimeout option and
        reset the timeout option.


                                                *'timeoutlen'* *'tm'*
'timeoutlen' 'tm'       number  (default 1000)
                        global
                        {not in all versions of Vi}

                                                *'ttimeoutlen'* *'ttm'*
'ttimeoutlen' 'ttm'   number  (default -1)
                        global
                        {not in Vi}
        The time in milliseconds that is waited for a key code or mapped key
        sequence to complete.  Normally only 'timeoutlen' is used and
        'ttimeoutlen' is -1.  When a different timeout value for key codes is
        desired set 'ttimeoutlen' to a non-negative number.

 ttimeoutlen mapping delay key code delay 
                   < 0                'timeoutlen'           'timeoutlen'
                  >= 0               'timeoutlen'           'ttimeoutlen'

        The timeout only happens when the 'timeout' and 'ttimeout' options
        tell so.  A useful setting would be
                :set timeout timeoutlen=3000 ttimeoutlen=100
        (time out on mapping after three seconds, time out on key codes after
        a tenth of a second).


                                                *'title'* *'notitle'*
'title'                  boolean  (default off, on when title can be restored)
                        global
                        {not in Vi}
                        {not available when compiled without the |+title|
                        feature}
        When on, the title of the window will be set to the value of
        'titlestring' (if it is not empty), or to "VIM - filename", where
        filename is the name of the file currently being edited.  Only works
        if the terminal supports setting window titles
        (currently Amiga console, Win32 console, all GUI versions and
        terminals with a non- empty 't_ts' option - these are Unix xterm and
        iris-ansi by default, where 't_ts' is taken from the builtin termcap).

                                                                *X11*
        When Vim was compiled with HAVE_X11 defined, the original title will
        be restored if possible.  The output of ":version" will include "+X11"
        when HAVE_X11 was defined, otherwise it will be "-X11".  This also
        works for the icon name |'icon'|.
        If the title cannot be restored, it is set to the value of 'titleold'.
        You might want to restore the title outside of Vim then.
        When using an xterm from a remote machine you can use this command:
            rsh machine_name xterm -display $DISPLAY &
        then the WINDOWID environment variable should be inherited and the
        title of the window should change back to what it should be after
        exiting Vim.


                                                                *'titlelen'*
'titlelen'            number  (default 85)
                        global
                        {not in Vi}
                        {not available when compiled without the |+title|
                        feature}
        Gives the percentage of 'columns' to use for the length of the window
        title.  When the title is longer, only the end of the path name is
        shown.  A '<' character before the path name is used to indicate this.
        Using a percentage makes this adapt to the width of the window.  But
        it won't work perfectly, because the actual number of characters
        available also depends on the font used and other things in the title
        bar.  When 'titlelen' is zero the full path is used.  Otherwise,
        values from 1 to 30000 percent can be used.
        'titlelen' is also used for the 'titlestring' option.


                                                *'titleold'*
'titleold'              string        (default "Thanks for flying Vim")
                        global
                        {not in Vi}
                        {only available when compiled with the |+title|
                        feature}
        This option will be used for the window title when exiting Vim if the
        original title cannot be restored.  Only happens if 'title' is on or
        'titlestring' is not empty.

                                                *'titlestring'*
'titlestring'              string  (default "")
                        global
                        {not in Vi}
                        {not available when compiled without the |+title|
                        feature}
        When this option is not empty, it will be used for the title of the
        window.  This happens only when the 'title' option is on.
        Only works if the terminal supports setting window titles (currently
        Amiga console, Win32 console, all GUI versions and terminals with a
        non-empty 't_ts' option).
        When Vim was compiled with HAVE_X11 defined, the original title will
        be restored if possible |X11|.
        When this option contains printf-style '%' items, they will be
        expanded according to the rules used for 'statusline'.
        Example:
 auto BufEnter * let &titlestring = hostname() . "/" . expand("%:p")
 set title titlestring=%<%F%=%l/%L-%P titlelen=70
        The value of 'titlelen' is used to align items in the middle or right
        of the available space.
        {not available when compiled without the |+statusline| feature}


                                *'toolbar'* *'tb'*
'toolbar' 'tb'             string  (default "icons,tooltips")
                        global
                        {only for YXXY+GUI_GTK|}
        The contents of this option controls various toolbar settings.  The
        possible values are:
                icons           Toolbar buttons are shown with icons.
                text            Toolbar buttons shown with text.
                tooltips        Tooltips are active for toolbar buttons.
        Tooltips refer to the popup help text which appears after the mouse
        cursor is placed over a toolbar button for a brief moment.

        If you want the toolbar to be shown with icons as well as text, do the
        following:
 :set tb=icons,text
        If none of the strings specified in 'toolbar' are valid of if
        'toolbar' is empty, this option is ignored.  If you want to disable
        the toolbar, you need to set the 'guioptions' option.  For example:
 :set guioptions-=T


                             *'ttybuiltin'* *'tbi'* *'nottybuiltin'* *'notbi'*
'ttybuiltin' 'tbi'     boolean  (default on)
                        global
                        {not in Vi}
        When on, the builtin termcaps are searched before the external ones.
        When off the builtin termcaps are searched after the external ones.
        When this option is changed, you should set the 'term' option next for
        the change to take effect, for example:
 :set notbi term=$TERM
        See also |termcap|.
        Rationale: The default for this option is "on", because the builtin
        termcap entries are generally better (many systems contain faulty
        xterm entries...).


                                     *'ttyfast'* *'tf'* *'nottyfast'* *'notf'*
'ttyfast' 'tf'             boolean  (default off, on when 'term' is xterm, hpterm,
                                        sun-cmd, screen, rxvt, dtterm or
                                        iris-ansi; also on when running Vim in
                                        a DOS console)
                        global
                        {not in Vi}
        Indicates a fast terminal connection.  More characters will be sent to
        the screen for redrawing, instead of using insert/delete line
        commands.  Improves smoothness of redrawing when there are multiple
        windows and the terminal does not support a scrolling region.
        Also enables the extra writing of characters at the end of each screen
        line for lines that wrap.  This helps when using copy/paste with the
        mouse in an xterm and other terminals.


                                                *'ttymouse'* *'ttym'*
'ttymouse' 'ttym'       string  (default depends on 'term')
                        global
                        {not in Vi}
                        {only in Unix, and not in the GUI}
        Name of the terminal type for which mouse codes are to be recognized.
        Currently these three strings are valid:
           xterm        xterm-like mouse handling.  The mouse generates
                        "<Esc>[Mscr", where "scr" is three bytes:
                                "s"  = button state
                                "c"  = column plus 33
                                "r"  = row plus 33
           xterm2       Works like "xterm", but with the xterm reporting the
                        mouse position while the mouse is dragged.  This works
                        much faster and more precise.  Your xterm must at
                        least at patchlevel 88  / XFree 3.3.3 for this to
                        work.  Determine your version with "xterm -version".
           dec          DEC terminal mouse handling.  The mouse generates
                        "<Esc>}r,c<CR>", where "r,c" are two decimal numbers
                        for the row and column.
           netterm      NetTerm mouse handling.  The mouse generates a rather
                        complex sequence, starting with "<Esc>[".
        The mouse handling must be enabled at compile time |+mouse_xterm|
        |+mouse_dec| |+mouse_netterm|.
        Only "xterm"(2) is really recognized.  DEC mouse codes are always
        recognized, when enabled at compile time.  NetTerm mouse codes are
        recognized when enabled at compile time, and 'ttymouse' is not
        "xterm".
        This option is automatically set to "xterm", when the 'term' option is
        set to a name that starts with "xterm", and 'ttymouse' not "xterm" or
        "xterm2" already.  The main use of this option is to set it to
        "xterm", when the terminal name doesn't start with "xterm", but it can
        handle xterm mouse codes.  The "xterm2" value must be set explicitly.


                                                *'ttyscroll'* *'tsl'*
'ttyscroll' 'tsl'       number  (default 999)
                        global
        Maximum number of lines to scroll the screen.  If there are more lines
        to scroll the window is redrawn.  For terminals where scrolling is
        very slow and redrawing is not slow this can be set to a small number,
        e.g., 3, to speed up displaying.


                                                *'ttytype'* *'tty'*
'ttytype'      'tty'              string  (default from $TERM)
                        global
        Alias for 'term', see above.


                                                *'undolevels'* *'ul'*
'undolevels' 'ul'               number  (default 100, 1000 for Unix and OS/2)
                        global
                        {not in Vi}
        Maximum number of changes that can be undone.  Since undo information
        is kept in memory, higher numbers will cause more more memory to be
        used (nevertheless, a single change can use an unlimited amount of
        memory).
        Set to 0 for Vi compatibility: One level of undo and "u" undoes
        itself:
 set ul=0
        But you can also get Vi compatibility by including the 'u' flag in
        'cpoptions', and still be able to use CTRL-R to repeat undo.
        Set to a negative number for no undo at all:
 set ul=-1
        This helps when you run out of memory for a single change.
        Also see |undo-two-ways|.


                                                *'updatecount'* *'uc'*
'updatecount' 'uc'     number  (default: 200)
                        global
                        {not in Vi}
        After typing this many characters the swap file will be written to
        disk.  When zero, no swap file will be created at all (see chapter on
        recovery |crash-recovery|).  'updatecount' is set to zero by starting
        Vim with the "-n" option, see |startup|.  When editing in readonly
        mode this option will be initialized to 10000.
        The swapfile can be disabled per buffer with |'swapfile'|.
        When 'updatecount' is set from non-zero to zero, swap files are
        created for all buffers that have 'swapfile' set.  When 'updatecount'
        is set to zero, existing swap files are not deleted.
        Also see |'swapsync'|.


                                                *'updatetime'* *'ut'*
'updatetime' 'ut'       number  (default 4000)
                        global
                        {not in Vi}
        If this many milliseconds nothing is typed the swap file will be
        written to disk (see |crash-recovery|).  Also used for the
        |CursorHold| autocommand event.


                                                *'verbose'* *'vbs'*
'verbose' 'vbs'           number  (default 0)
                        global
                        {not in Vi}
        When bigger than zero, Vim will give messages about what it is doing.
        Currently, these messages are given:
        >= 1 When a file is ":source"'ed.
        >= 1 When the viminfo file is read or written.
        >= 8 Files for which a group of autocommands is executed.
        >= 9 Every executed autocommand.
        >=15 Every executed function line.

        This option can also be set with the "-V" argument.  See |-V|.


                                                *'viminfo'* *'vi'*

'viminfo' 'vi'             string  (default "")
                        global
                        {not in Vi}
                        {not available when compiled without the  |+viminfo|
                        feature}
        When non-empty, the viminfo file is read upon startup and written
        when exiting Vim (see |viminfo-file|).  The string should be a comma
        separated list of parameters, each consisting of a single character
        identifying the particular parameter, followed by a number or string
        which specifies the value of that parameter.  If a particular
        character is left out, then the default value is used for that
        parameter.  The following is a list of the identifying characters and
        the effect of their value.
 CHAR VALUE 
        ''      Maximum number of previously edited files for which the marks
                are remembered.  This parameter must always be included when
                'viminfo' is non-empty.
        f   Whether file marks need to be stored.  If zero, file marks ('0
                to '9, 'A to 'Z) are not stored.  When not present or when
                non-zero, they are all stored.  '0 is used for the current
                cursor position (when exiting or when doing ":wviminfo").
        r   Removable media.  The argument is a string (up to the next
                ',').  This parameter can be given several times.  Each
                specifies the start of a path for which no marks will be
                stored.  This is to avoid removable media.  For MS-DOS you
                could use "ra:,rb:", for Amiga "rdf0:,rdf1:,rdf2:".  Case is
                ignored.  Maximum length of each 'r' argument is 50
                characters.
        "  Maximum number of lines saved for each register.  If zero then
                registers are not saved.  When not included, all lines are
                saved.  Dont forget to put a backslash before the ", otherwise
                it will be recognized as the start of a comment!
        :       Maximum number of items in the command-line history to be
                saved.  When not included, the value of 'history' is used.
        /       Maximum number of items in the search pattern history to be
                saved.  If non-zero, then the previous search and substitute
                patterns are also saved.  When not included, the value of
                'history' is used.
        h   Disable the effect of 'hlsearch' when loading the viminfo
                file.  When not included, it depends on whether ":nohlsearch"
                has been used since the last search command.
        @       Maximum number of items in the input-line history to be
                saved.  When not included, the value of 'history' is used.
        n  Name of the viminfo file.  The name must immediately follow
                the 'n'.  Must be the last one!  If the "-i" argument was
                given when starting Vim, that file name overrides the one
                given here with 'viminfo'.  Environment variables are expanded
                when opening the file, not when setting the option.
        %   When included, save and restore the buffer list.  If Vim is
                started with a file name argument, the buffer list is not
                restored.  If Vim is started without a file name argument, the
                buffer list is restored from the viminfo file.  Buffers
                without a file name and buffers for help files are not written
                to the viminfo file.
        !       When included, save and restore global variables that start
                with an uppercase letter, and don't contain a lowercase
                letter.

        Example:
 :set viminfo='50,\"1000,:0,n~/vim/viminfo

        '50             Marks will be remembered for the last 50 files you
                        edited.
        "1000              Contents of registers (up to 1000 lines each) will be
                        remembered.
        :0              Command-line history will not be saved.
        n~/vim/viminfo  The name of the file to use is "~/vim/viminfo".
        no /            Since '/' is not specified, the default will be used,
                        that is, save all of the search history, and also the
                        previous search and substitute patterns.
        no %                The buffer list will not be saved nor read back.
        no h                'hlsearch' highlighting will be restored.


                        *'visualbell'* *'vb'* *'novisualbell'* *'novb'* *beep*
'visualbell' 'vb'       boolean  (default off)
                        global
                        {not in Vi}
        Use visual bell instead of beeping.  The terminal code to display the
        visual bell is given with 't_vb'.  When no beep or flash is wanted,
        use ":set vb t_vb=".
        Note: When the GUI starts, 't_vb' is reset to its default value.  You
        might want to set it again in your |gvimrc|.
        Does not work on the Amiga, you always get a screen flash.  Also see
        'errorbells'.


                                                *'warn'* *'nowarn'*
'warn'                    boolean  (default on)
                        global
        Give a warning message when a shell command is used while the buffer
        has been changed.


                     *'weirdinvert'* *'wiv'* *'noweirdinvert'* *'nowiv'*
'weirdinvert' 'wiv'   boolean  (default off)
                        global
                        {not in Vi}
        This option has the same effect as the 't_xs' termcap option.
        It is provided for backwards compatibility with version 4.x.
        Setting 'weirdinvert' has the effect of making 't_xs' non-empty, and
        vice versa.  Has no effect when the GUI is running.


                                                *'whichwrap'* *'ww'*
'whichwrap' 'ww' string  (Vim default: "b,s", Vi default: "")
                        global
                        {not in Vi}
        Allow specified keys that move the cursor left/right to wrap to the
        previous/next line when the cursor is on the first/last character in
        the line.  Concatenate characters to allow this for these keys:
 char key mode 
                 b    <BS>        Normal and Visual
                 s    <Space>  Normal and Visual
                 h    "h"      Normal and Visual
                 l    "l"      Normal and Visual
                 <    <Left>      Normal and Visual
                 >    <Right>    Normal and Visual
                 ~    "~"  Normal
                 [    <Left>        Insert and Replace
                 ]    <Right>      Insert and Replace
        For example:
 :set ww=<,>,[,]
        allows wrap only when cursor keys are used.
        When the movement keys are used in combination with a delete or change
        operator, the <EOL> also counts for a character.  This makes "3h"
        different from "3dh" when the cursor crosses the end of a line.  This
        is also true for "x" and "X", because they do the same as "dl" and
        "dh".  If you use this, you may also want to use the mapping
        ":map <BS> X" to make backspace delete the character in front of the
        cursor.
        When 'l' is included, you get a side effect: "yl" on an empty line
        will include the <EOL>, so that "p" will insert a new line.
        When 'compatible' is set, 'whichwrap' is set to "".


                                                *'wildchar'* *'wc'*
'wildchar' 'wc'           number  (Vim default: <Tab>, Vi default: CTRL-E)
                        global
                        {not in Vi}
        Character you have to type to start wildcard expansion in the
        command-line.  CTRL-E is used when the 'compatible' option is set.
        The character is not recognized when used inside a macro.  Although
        'wc' is a number option, you can set it to a special key:
 :set wc=<Esc>


                                                *'wildcharm'* *'wcm'*
'wildcharm' 'wcm'       number  (default: none (0))
                        global
                        {not in Vi}
        'wildcharm' works exactly like 'wildchar', except that it is
        recognized when used inside a macro. You can find "spare" command-line
        keys suitable for this option by looking at |ex-edit-index|. Normally
        you'll never actually type 'wildcharm', just use it in mappings that
        automatically invoke completion mode, e.g.:
 :set wc=<C-Z>
 :cmap ss so $vim/sessions/*.vim<C-Z>
        Then after typing :ss you can use CTRL-P & CTRL-N.


                                                *'wildignore'* *'wig'*
'wildignore' 'wig'     string  (default "")
                        global
                        {not in Vi}
                        {not available when compiled without the |+wildignore|
                        feature}
        A list of file patterns.  A file that matches with one of these
        patterns is ignored when completing file or directory names.
        The pattern is used like with |:autocmd|, see |autocmd-patterns|.
        Also see 'suffixes'.
        Example:
 :set wildignore=*.o,*.obj
        The use of |:set+=| and |:set-=| is preferred when adding or removing
        a pattern from the list.  This avoids problems when a future version
        uses another default.


                                                        *'wildmenu'* *'wmnu'*
'wildmenu' 'wmnu'       boolean  (default off)
                        global
                        {not in Vi}
                        {not available if compiled without the +wildmenu
                        feature}
        When 'wildmenu' is on, command-line completion operates in an enhanced
        mode.  On pressing 'wildchar' (usually <Tab>) to invoke completion,
        the possible matches are shown just above the command line, with the
        first match highlighted (overwriting the status line, if there is
        one).  Keys that show the previous/next match, such as <Tab> or
        CTRL-P/N, cause the highlight to move to the appropriate match.  If
        there are more matches than can fit in the line, a ">" is shown on the
        right and/or a "<" is shown on the left.  The status line scrolls as
        needed.
        The "wildmenu" mode is abandoned when a key is hit that is not used
        for selecting a completion.
        While the "wildmenu" is active the following keys have special
        meanings:

        <Left> <Right>       - select previous/next match (like CTRL-P/N)
        <Down>             - in filename/menu name completion: move into a
                          subdirectory or submenu.
        <CR>         - in menu completion, when the cursor is just after a
                          dot: move into a submenu.
        <Up>         - in filename/menu name completion: move up into
                          parent directory or parent menu.

        This makes the menus accessible from the console |console-menus|.

        The "WildMenu" highlighting is used for displaying the current match
        |hl-WildMenu|.


                                                *'wildmode'* *'wim'*
'wildmode' 'wim' string  (Vim default: "full")
                        global
                        {not in Vi}
        Completion mode that is used for the character specified with
        'wildchar'.  It is a comma separated list of up to four parts.  Each
        part specifies what to do for each consecutive use of 'wildchar.  The
        first part specifies the behavior for the first use of 'wildchar',
        The second part for the second use, etc.
        These are the possible values for each part:
        ""            Complete only the first match.
        "full"                Complete the next full match.  After the last match,
                        the original string is used and then the first match
                        again.
        "longest"     Complete till longest common string.  If this doesn't
                        result in a longer string, use the next part.
        "list"                When more than one match, list all matches.
        "list:full"   When more than one match, list all matches and
                        complete first match.
        "list:longest"        When more than one match, list all matches and
                        complete till longest common string.
        When there is only a single match, it is fully completed in all cases.

        Examples:
 set wildmode=full
        Complete first full match, next match, etc. (the default)
 set wildmode=longest,full
        Complete longest common string, then each full match.
 set wildmode=list:full
        List all matches and complete each full match.
 set wildmode=list,full
        List all matches without completing, then each full match.
 set wildmode=longest,list
        Complete longest common string, then list alternatives.


                                                *'winaltkeys'* *'wak'*
'winaltkeys' 'wak'     string  (default "menu")
                        global
                        {not in Vi}
                        {only used in Win32 and Motif GUI; GTK only supports
                        "yes" and "menu"}
        Some GUI versions allow the access to menu entries by using the ALT
        key in combination with a character that appears underlined in the
        menu.  This conflicts with the use of the ALT key for mappings and
        entering special characters.  This option tells what to do:
          no    Don't use ALT keys for menus.  ALT key combinations can be
                mapped, but there is no automatic handling.  This can then be
                done with the |:simalt| command.
          yes   ALT key handling is done by the windowing system.  ALT key
                combinations cannot be mapped.
          menu  Using ALT in combination with a character that is a menu
                shortcut key, will be handled by the windowing system.  Other
                keys can be mapped.
        If the menu is disabled by excluding 'm' from 'guioptions', the ALT
        key is never used for the menu.
        In the Win32 version, the <F10> key is handled like this too, since
        Windows uses it to select a menu.


                                                *'winheight'* *'wh'*
'winheight' 'wh' number  (default 1)
                        global
                        {not in Vi}
        Minimal number of lines for the current window.  This is not a hard
        minimum, Vim will use less lines if there is not enough room.  If the
        current window is smaller, its size is increased, at the cost of the
        height of other windows.  Set it to 999 to make the current window
        always fill the screen.  Set it to a small number for normal editing.
        The height is not adjusted after one of the commands to change the
        height of the current window.
        'winheight' applies to the current window.  Use 'winminheight' to set
        the minimal height for other windows.


                                                *'winminheight'* *'wmh'*
'winminheight' 'wmh' number  (default 1)
                        global
                        {not in Vi}
        The minimal height of a window, when it's not the current window.
        This is a hard minimum, windows will never become smaller.
        When set to zero, windows may be "squashed" to zero lines (i.e. just a
        status bar) if necessary.  They will return to at least one line when
        they become active (since the cursor has to have somewhere to go.)
        Use 'winheight' to set the minimal height of the current window.
        This option is only checked when making a window smaller.  Don't use a
        large number, it will cause errors when opening more than a few
        windows.  A value of 0 to 3 is reasonable.


                                                *'wrap'* *'nowrap'*
'wrap'                    boolean  (default on)
                        local to window
                        {not in Vi}
        When on, lines longer than the width of the window will wrap and
        displaying continues on the next line.  When off lines will not wrap
        and only part of long lines will be displayed.  When the cursor is
        moved to a part that is not shown, the screen will scroll horizontally
        (also see 'sidescroll' and 'listchars' options and |wrap-off|).  If
        you want to break long lines, see 'textwidth'.


                                                *'wrapmargin'* *'wm'*
'wrapmargin' 'wm'       number  (default 0)
                        local to buffer
        Number of characters from the right window border where wrapping
        starts.  When typing text beyond this limit, an <EOL> will be inserted
        and inserting continues on the next line.  When 'textwidth' is
        non-zero, this option is not used.  See also 'formatoptions' and
        |ins-textwidth|.  {Vi: works differently and less useful}


                                   *'wrapscan'* *'ws'* *'nowrapscan'* *'nows'*
'wrapscan' 'ws'           boolean  (default on)
                        global
        Searches wrap around the end of the file.


                                                   *'write'* *'nowrite'*
'write'                  boolean  (default on)
                        global
                        {not in Vi}
        Allows writing files.  When not set, writing a file is not allowed.
        Can be used for a view-only mode, where modifications to the text are
        still allowed.  Can be reset with the |-m| command line argument.
        Filtering text is still possible, even though this requires writing a
        temporary file.


                                   *'writeany'* *'wa'* *'nowriteany'* *'nowa'*
'writeany' 'wa'           boolean  (default off)
                        global
        Allows writing to any file with no need for "!" override.


                             *'writebackup'* *'wb'* *'nowritebackup'* *'nowb'*
'writebackup' 'wb'     boolean  (default on with |+writebackup| feature, off
                                        otherwise)
                        global
                        {not in Vi}
        Make a backup before overwriting a file.  The backup is removed after
        the file was successfully written, unless the 'backup' option is
        also on.  Reset this option if your file system is almost full.  See
        |backup-table| for another explanation.


                                                *'writedelay'* *'wd'*
'writedelay' 'wd'       number  (default 0)
                        global
                        {not in Vi}
        The number of microseconds to wait for each character sent to the
        screen.  When non-zero, characters are sent to the terminal one by
        one.  For MS-DOS pcterm this does not work.  For debugging purposes.

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