Player foot switches

I’ve got button one set to FX1 and button two set to FX2 on most of my rigs (FX1 for me is typically touch wah and FX2 is either delay or chorus). I’ve got a Chocolate that I’m using in the default setting to switch rigs. Button 3 is currently set for tap/tuner, but since I’ve got a Polytune Mini on my board I don’t normally use that, so I’m not really making good use of that third button. Any suggestions for how to make use of it?