Piano Roll to expand AND collapse using single click on the tab

[Misha]

Don't know if it was requested before or not.  I started using more MIDI edits in the past couple of years and I think current method would benefit from slight improvement.

https://www.youtube.com/watch?v=OjhApm9etUc

[sjoens]

I requested it moons ago, but once you're in Multidock you can toggle between it and Track View with the D key.

[Starship Krupa]

Try some Shift+D as well.

I agree that it would be nice to have buttons for those functions on the UI.