(defcustom mouse-sel-mode nil
"Toggle Mouse Sel mode.
When Mouse Sel mode is enabled, mouse selection is enhanced in various ways.
-This variable should be set only with \\[customize], which is equivalent
-to using the function `mouse-sel-mode'."
+Setting this variable directly does not take effect;
+use either \\[customize] or the function `mouse-sel-mode'."
:set (lambda (symbol value)
(mouse-sel-mode (or value 0)))
:initialize 'custom-initialize-default