Try looking under switch assignment in the manual. In my airtronics radio they call it Boolean condition; or/and. Using Boolean Conditions OR/ANDSwitches can be made to operate interdependently using the Boolean conditions OR/AND. You can assign a function to two different switches and make them dependent on one another. For example, the SnapRoll function can be assigned to switch position 21 AND to switch position 24 (Gear). Doing this will allow the Snap Rollfunction to work ONLY when the landing gear is retracted. This makes the operation of the Snap Roll function dependent onthe landing gear being retracted. This would prevent a crash if you accidently hit the Snap Roll switch instead of the landinggear switch after takeoff.