Solo/mute selected track.
I often need to listen to one single clip amongst other on different tracks. Today I grab the mouse, drag it aaaall the way over to the left side on my my huge 4K screen to that tiny, tiny little solo-button by eye balling the horisontal level and pray that it is the right track.
Everything could be so much easier if there was a shortcutable function that just solo/unsolo or mute/unmute the track where a selection is done.
That function alone would save aloooot of mouse mileage.