How do I set up the Piano Roll editor so that the content of muted regions (or whole tracks) doesn't appear? I have the score editor set up this way, but I can't remember how I did it. Somewhere in preferences or on some menu is the option to hide muted regions, which I almost always prefer, but I can't remember where this option is! Please remind...it's a great feature, IMO, and I do hope it is available in Piano Roll. Also, speaking of Piano Roll, how about that phantom hierarchy button? It is described on manual page 65, and would be a great feature for me, but there isn't a hierarchy button on my Piano Roll. Does anyone have this?