Variable: split-width-threshold
split-width-threshold is a customizable variable defined in
window.el.gz.
Value
160
Documentation
Minimum width for splitting windows sensibly.
If this is an integer, split-window-sensibly may split a window
horizontally only if it has at least this many columns. If this
is nil, split-window-sensibly is not allowed to split a window
horizontally.
This variable was added, or its default value changed, in Emacs 23.1.
Probably introduced at or before Emacs version 23.1.
Source Code
;; Defined in /usr/src/emacs/lisp/window.el.gz
(defcustom split-width-threshold 160
"Minimum width for splitting windows sensibly.
If this is an integer, `split-window-sensibly' may split a window
horizontally only if it has at least this many columns. If this
is nil, `split-window-sensibly' is not allowed to split a window
horizontally."
:type '(choice (const nil) (integer :tag "columns"))
:version "23.1"
:group 'windows)