Variable: speedbar-window-default-width
speedbar-window-default-width is a customizable variable defined in
speedbar.el.gz.
Value
20
Documentation
Initial width in characters of speedbar-window.
Specified the desired width when speedbar-window is opened on the left or
right side. The default value is the same width of speedbar-frame-mode.
This variable was added, or its default value changed, in Emacs 31.1.
Probably introduced at or before Emacs version 31.1.
Source Code
;; Defined in /usr/src/emacs/lisp/speedbar.el.gz
(defcustom speedbar-window-default-width 20
"Initial width in characters of `speedbar-window'.
Specified the desired width when `speedbar-window' is opened on the left or
right side. The default value is the same width of `speedbar-frame-mode'."
:type 'integer
:group 'speedbar
:version "31.1")