Some controllers let you set a button to be either an on/off or latch on/latch off setting - but lots of controllers don't.
Right now I can turn on a effect (lets say blur) as soon as I let go - it turns off. I want to be able to press ON, let go, and then press it again to turn it off.
Probably best offered as a right click on each button - basically if I can right click on a button and turn latch on/off it would solve a lot of issues we're having with midi.