Quad-clicking selects paragraphs.
- Selecting sets the region & X primary selection, but does NOT affect
-the kill-ring. Because the mouse handlers set the primary selection
-directly, mouse-sel sets the variables interprogram-cut-function
-and interprogram-paste-function to nil.
+the kill-ring, nor do the kill-ring function change the X selection.
+Because the mouse handlers set the primary selection directly,
+mouse-sel sets the variables interprogram-cut-function and
+interprogram-paste-function to nil.
- Clicking mouse-2 inserts the contents of the primary selection at
the mouse position (or point, if mouse-yank-at-point is non-nil).