Hi - Yes I've noticed that the scribble strip over the EXP pedal can be tricky to set. The Command Centre will allow you to do this but only if the Toe Switch has been set to bypass a block.
1. Select any block / BYPASS ASSIGN / Set to EXP TOE
2. Go to COMMAND CENTRE / Press CUSTOMISE (Enter label here) / OK
3. SAVE !
Let me know if this worked for you.