Variable: mouse-drag-and-drop-region-show-tooltip
mouse-drag-and-drop-region-show-tooltip is a customizable variable
defined in mouse.el.gz.
Value
256
Documentation
If non-nil, text is shown by a tooltip in a graphic display.
If this option is nil, mouse-drag-and-drop-region(var)/mouse-drag-and-drop-region(fun) does not show
tooltips. If this is t, it shows the entire text dragged in a
tooltip. If this is an integer (as with the default value of
256), it will show up to that many characters of the dragged text
in a tooltip.
This variable was added, or its default value changed, in Emacs 26.1.
Probably introduced at or before Emacs version 26.1.
Source Code
;; Defined in /usr/src/emacs/lisp/mouse.el.gz
(defcustom mouse-drag-and-drop-region-show-tooltip 256
"If non-nil, text is shown by a tooltip in a graphic display.
If this option is nil, `mouse-drag-and-drop-region' does not show
tooltips. If this is t, it shows the entire text dragged in a
tooltip. If this is an integer (as with the default value of
256), it will show up to that many characters of the dragged text
in a tooltip."
:type '(choice
(const :tag "Do not show tooltips" nil)
(const :tag "Show all text" t)
(integer :tag "Max number of characters to show" 256))
:version "26.1")