It appears that the Show/Hide Lanes key command only works if you have the track selected.
If you have one of it’s ‘child’ Lanes selected? No workee.
This seems dumb. To me, if I’m editing a track with 20 lanes, I have to… again… grab the mouse and scroll up to the track in order to hide the lanes. I should be able to Show/Hide Lanes with any component of the track selected.
Bug or F/R?