Logic Pro 9 new quickswipe on/off button


Is there a key command or shortcut for this? Just cos I spend a lot of time zoomed in when I'm comping, and having to zoom out, shimmy over to the button, then zoom back in again is a bit of a pain in the rear end! It would be much nicer to press a key and engage/disengage comping. I couldnt find anything in the manual about this :(