Is there a hot key to change multiple channels from mono to stereo and visa versa?
If you want to turn multiple mono tracks to stereo tracks and vice versa then there is no way to do this with a single command, at least not one that I am aware of. It doesn’t work with Q-Link and there is no command adressing this function in the PLE. Given you are refering to the track/channel basis:

If you just want to do a quick mono check on stereo tracks instead of turning the tracks/channels into “real” mono/stereo tracks - that’s a different story and easy to solve.
Load the stock plugin MonoToStereo into the last free insert slot of your targeted track and click on Mono.
(Just bypass the plugin if you want to go back to strereo. )
If you want to do that for multiple channels open the mixer and
- Copy the plugin to all tracks you want to check by holding down alt (option on Mac) and dragging the plugin onto the tracks. Make sure that it’s the same slot, please.
- Select the channels you want to switch to mono by holding down Shift and clicking at the bottom of the fader region.
- Hold down Alt (option on Mac) & Shift and bypass any one of these plugins on any of these selected channels. This will affect all selected channels at once. If you want to go back to the previous state just repeat steps 2 and 3.
There are other possibilities but this seems to be pretty straight-forward to me.
HTH
I didn’t think so, but thanks for your confirmation.
