right... ok, yes we have in Reaper the option to show or not show a trak in the mixer... that is helpful... a toggle to show 'all hidden' \ 'hide all hidden' might be good Still, I think my main desire would be for a few more optional mixers, and then the option to 'show this track in mixer 1, 2, 3'.... with this we could quickly bring up one or more mixer windows that would each have special purposes. How nice it would be to have just one mixer for say a multi-out vsti... like BFD or Addictive Drums, etc. and then be able to vanish that mixer and have another for mainly the remaining single trak stems.... single vocals and single instruments, eh? Anyway that is what I've been thinking about... I'm not a programmer so I don't know if that is a very difficult addition or not...