Expression pedals compatible with Morningstar?

Is there anyone out there that can help me figure out how to use my expression pedal with the MC6 Pro? I’m connected to Omniport 1 via 1 TRS to my Boss Dual EV-90. I calibrated the expression & restarted the MC6 Pro but I cannot seem to get the Editor to recognize the expression pedal so I’m stuck. When I’m in a preset & click on Select Expression Message is shows a lot of Messages to check but I don’t see how or where to create the Messages. Any help is greatly appreciated! Cheers,

Hi,
on the bottom right in the ‘edit preset’ tab.

Choose EXP 1 if the pedal is connected to omniport 1, EXP 2 if it is connected to omniport 2 and so on

How are you using the dual expression given you can map any expression pedal to 16 channels as is?