foldout-mouse-modifiers

foldout-mouse-modifiers is a variable defined in `foldout.el'.
Its value is

(meta control)

Documentation:
List of modifier keys to apply to foldout's mouse events.

The default (meta control) makes foldout bind its functions to
M-C-down-mouse-{1,2,3}.

Valid modifiers are shift, control, meta, alt, hyper and super.