This article will document how you can lock pedals on a RS-31(H) Foot Switch.
Lockable Pedals on RS-31(H) Foot Switch
You are able to lock either the top or the centre pedal on an RS-31(H) foot switch.
On the back of the foot switch there is a lock. Slide up to lock the top pedal and slide down to lock the centre pedal. Keep it centred to release so you are able to use all 4 pedals.