I've done a couple gigs and many band practices with my MOD. I use my foot to push the upper right knob (the one close to the screen) down while I am standing. I use the bar that runs across the top of the pedal as an "anchor" and then tip my foot forward till I "click" it and go into tuner mode. I'm not the best at balancing, but this goes well.
Let me know if that helps.