Allow double-tap of modifier key as show/hide hotkey
By volk.p... on January 14, 2011 19:41 (imported from Google Code)
allow setting the hotkey for the show/hide feature to be a double-tap of one of the keyboard modifier keys (control or option or command). this feature is available in visor, alfred, quicksilver, among others.
here is a link to the discussion in the google group: