Yes, we have kept Ctrl on PC, which will always correspond to Cmd on Mac in our setup. Likewise will Alt on PC correspond to Option on Mac.
Yes, I was thinking holding the key pressed, while you can do other things like drawing. However, you wouldn’t be able to press other keys of course, which makes this feature a strictly temporary thing: Drawing… hold +… drawing detail… release +.
I was thinking the opposite would be handy, if you where drawing the details (not a temporary detail as above, but a bigger part of the drawing needing to have a zoomed in view) – so you would just be zoomed in normally. Then you wanted to check the bigger picture – see how the details look in the full frame – so you press and hold [-] for a few seconds and release the key again.
Two options? I think that is exactly what I am thinking. + and – keys. But maybe I’m not understanding what you mean by two options? Please elaborate. (If you have the time of course. You are probably busy. Appreciated!)