I'm setting up a new PBC6X/MEGX Rig and have one of these X100 pedals.
The pedal has 4 channel modes, BLUE/GREEN/YELLOW/RED.
I have FN1 on the PBC6X default to BLUE, when it switches ON it goes to GREEN. It's a momentary switch, and each press cycles through the channels.
@rjmmusic is it...