Variable: help-window-keep-selected
help-window-keep-selected is a customizable variable defined in
help.el.gz.
Value
nil
Documentation
If non-nil, navigation commands in the *Help* buffer will reuse the window.
If nil, many commands in the *Help* buffer, like s (help-view-source) and i (help-goto-info), will
pop to a different window to display the results.
Also see help-window-select.
This variable was added, or its default value changed, in Emacs 29.1.
Probably introduced at or before Emacs version 29.1.
Source Code
;; Defined in /usr/src/emacs/lisp/help.el.gz
(defcustom help-window-keep-selected nil
"If non-nil, navigation commands in the *Help* buffer will reuse the window.
If nil, many commands in the *Help* buffer, like \\<help-mode-map>\\[help-view-source] and \\[help-goto-info], will
pop to a different window to display the results.
Also see `help-window-select'."
:type 'boolean
:group 'help
:version "29.1")