When opening the PRV for a track or when changing the tracks to display in PRV, Sonar shows all controllers as separate lanes in the controller pane initially. It would be nice to have an option to close all (or selected) lanes at once (leaving only one single lane for velocity). Or being able to set a maximum of controller lanes that are opened in those cases.
 
When having many controller types, it can be tedious to reduce them to a reasonable number. It even may be impossible, because the lanes become too small and no longer display the minus button for closing the lane when there are too many lanes.

This is one thing I do not like about the controllers in PRV.  The same thing happens in the envelopes in the track view.  A close all but velocity would be handy....

I want it simple like Studio One. You just click Velocity to show the velocity lane, click Modulation to show the modulation lane, and so forth...