Yamaha DTXpress/DTXplorer/DTXtreme

On my e-drum set (not a Yamaha, Sorry!) I'm trying to decide on what
to do about my high hat.  It's easy when you either play it open or
closed but I can't figure out how to do half open.  I have a setting
for it so I can assign it to either the cymbal or the pedal but then I
lose one of the others. Any suggestions?

Patti B, MO