This came up on a facebook group.
A mistake which is common is to be in, say Mix 2 – making adjustments to someone’s foldback mix but not realise that you haven’t switched back to LR and then you start making adjustments (which of course make no difference to FOH) so you crank it and the bass player’s brain explodes!!
What was suggested was the option to set certain Aux mixes to not latch so that you can hold it with your right hand, make adjustments with your left and then when you release, you’re back on LR.
I’d like to complicate that a bit where you double press to latch it but single press does the above. Optional on any mix or send (including the FX ones and if you’re using any for groups).