cyberzip
What hot keys are you referring to here? V & A?
Previous to 2017.03 (which I don't have and never will have)
When I have a PRV filled with many tracks and want to see only one track:
I most always, first, click on a note in the PRV
and then that track becomes active and is highlighted in the right side list of tracks.
( 2017.03 eliminated the possibility of clicking on a note and having that track become active and also highlighted in the list. )
I then un-tick the color box for that track and type a "V"
the "V" inVerts the selection so now I only see the track that I originally un-ticked the color for.
It also works with multiple tracks, so If I want to see 3 tracks only out of 20 I un-tick the color on those tracks and type a "V".
Typing "A" once again shows you All tracks.
It's very fast for me to do this pervious to 2017.03
2017.03 eliminated the quick toggling of the view of tracks in this way, i.e. by un-ticking a color and typing "V" and then "A" to once again show all.