Variable: Buffer-menu-name-width
Buffer-menu-name-width is a customizable variable defined in
buff-menu.el.gz.
Value
Buffer-menu--dynamic-name-width
Documentation
Width of buffer name column in the Buffer Menu.
This can either be a number (used directly) or a function that will be called with the list of buffers and should return a number.
This variable was added, or its default value changed, in Emacs 28.1.
Probably introduced at or before Emacs version 24.3.
Source Code
;; Defined in /usr/src/emacs/lisp/buff-menu.el.gz
(defcustom Buffer-menu-name-width #'Buffer-menu--dynamic-name-width
"Width of buffer name column in the Buffer Menu.
This can either be a number (used directly) or a function that
will be called with the list of buffers and should return a
number."
:type '(choice function number)
:group 'Buffer-menu
:version "28.1")