Toggle on/off option would be nice and should of been thought up of during this concepts planning phase.
However, I wouldn't mind the ability to select which hotbars it shows up for either. Seeing I am sure some out there use extra bars to keep track of oGCD abilities with long cool downs, but get screwed over on activation when said skills look ready, but had nearly 2 or so seconds left till ready <_<

But least give us a toggle at the minimum SE.