I accidentatally hit the Looper Mode button again during a rehearsal which induced panic mid song. I never use the Lopper live so wondered what else I could assign to the button that might be more useful. I stumbled across this while messing around with button assignments options in the system menu.
There is an option for A - Rev invert. It does what it says on the tin. Any Stomp/FX that is On gets turned Off and any that is Off gets turned On with a single button press. Effectively, every rig can have two totally different states (scenes). I works in addition to the normal footswtiches I-IIII so whatever is active at any point in time can be toggled in a single step.
To be honest it isn't something I am likely to use and I will probably set the Looper Button to Rotary Speed or a Global Delay On/Off button to save me programming every rig individually but someone might find a use for it 