mode-line-buffer-identification

mode-line-buffer-identification is a variable defined in `bindings.el'.
Its value is shown below.

• Automatically becomes buffer-local when set.
• This variable may be risky if used as a file-local variable.

Documentation:
Mode line construct for identifying the buffer being displayed.
Its default value is ("%12b") with some text properties added.
Major modes that edit things other than ordinary files may change this
(e.g. Info, Dired,...)

Value:

(#("%12b" 0 4
   (local-map
    (keymap
     (header-line keymap
		  (mouse-3 . mode-line-next-buffer)
		  (down-mouse-3 . ignore)
		  (mouse-1 . mode-line-previous-buffer)
		  (down-mouse-1 . ignore))
     (mode-line keymap
		(mouse-3 . mode-line-next-buffer)
		(mouse-1 . mode-line-previous-buffer)))
    mouse-face mode-line-highlight help-echo "Buffer name\nmouse-1: Previous buffer\nmouse-3: Next buffer" face mode-line-buffer-id)))