by
the 'toolbar' option.  You can choose between an image, text or both.

                                                        *toolbar-icon*
The toolbar is defined as a special menu called ToolBar, which only has one
level.  Vim interprets the items in this menu as follows:
- 1 If an "icon=" argument was specified, the file with this name is used.
    The file can either be specified with the full path or with the base name.
    In the last case it is searched for in the "bitmaps" directory in
    'runtimepath', like in point 3.  Examples: >
        :amenu icon=/usr/local/pixmaps/foo_icon.xpm ToolBar.Foo :echo "Foo"<CR>
        :amenu icon=FooIcon ToolBar.Foo :echo "Foo"<CR>
<   Note that in the first case the extension is included, while in the second
    case it is omitted.
    If the file cannot be opened the next points are tried.
    A space in the file name must be escaped with a backslash.
    A menu priority must come _after_ the icon argument: >
        :amenu icon=foo 1.42 ToolBar.Foo :echo "42!"<CR>
- 2 An item called 'BuiltIn##', where ## is a number, is taken as number ## of
    the built-in bitmaps available in Vim.  Currently there are 31 numbered
    from 0 to 30 which cover most common editing operations |builtin-tools|. >
        :amenu ToolBar.BuiltIn22 :call SearchNext("back")<CR>
- 3 An item with another name is first searched for in the directory
    "bitmaps" in 'runtimepath'.  If found, the bitmap file is used as the
    toolbar button image.  Note that the exact filename is OS-specific: For
    example, under Win32 the command >
        :amenu ToolBar.Hello :echo "hello"<CR>
<   would find the file 'hello.bmp'.  Under X11 it is 'Hello.xpm'.
    For MS-Windows and the bitmap is scaled to fit the button.  For
    MS-Windows a size of 18 by 18 pixels works best.
    For MS-Windows the bitmap should have 16 colors with the standard palette.
    The light grey pixels will be changed to the Window frame color and the
    dark grey pixels to the window shadow color.  More colors might also work,
    depending on your system.
- 4 If the bitmap is still not found, Vim checks for a match against its list
    of built-in names.  Each built-in button image has a name.
    So the command >
        :amenu ToolBar.Open :e
<   will show the built-in "open a file" button image if no open.bmp exists.
    All the built-in names can be seen used in menu.vim.
- 5 If all else fails, a blank, but functioning, button is displayed.

                                                        *builtin-tools*
>
    nr  Name                Normal action
    00  New                 open new window
    01  Open                browse for file to open in current window
    02  Save                write buffer to file
    03  Undo                undo last change
    04  Redo                redo last undone change
    05  Cut                 delete selected text to clipboard
    06  Copy                copy selected text to clipboard
    07  Paste               paste text from clipboard
    08  Print               print current buffer
    09  Help                open a buffer on Vim's builtin help
    10  Find                start a search command
    11  SaveAll             write all modified buffers to file
    12  SaveSesn            write session file for current situation
    13  NewSesn             write new session file
    14  LoadSesn            load session file
    15  RunScript           browse for file to run as a Vim script
    16  Replace             prompt for substitute command
    17  WinClose            close current window
    18  WinMax              make current window use many lines
    19  WinMin              make current window use few lines
    20  WinSplit            split current window
    21  Shell               start a shell
    22  FindPrev            search again, backward
    23  FindNext            search again, forward
    24  FindHelp            prompt for word to search help for
    25  Make