There is an Expression Pedal Lock option in System Mode called PDL LOCK, which you can turn on to prevent any programming of the expression pedal. You could pre-program your Presets and store Presets with no Expression Pedal settings at all when you want the Expression Pedal to be "OFF". Then, simply load a different Preset that does have Expression Pedal settings already programmed when you want Expression Pedal to be "ON."
Alan
