Thanks everyone BUT my request is still,

Please make the default mixer behavior to display all 7 legacy tracks.

I want ALL 7 legacy tracks to be visible and stay visible regardless of whether or not they are currently loaded with an instrument. It makes no sense to me to hide things like a mixer track just because I do not currently have an instrument on it.

- When I turn all of the legacy tracks on and then exit BIAB...Soloist is hidden when I open back up.
- When I load a style that has less than 5 tracks...BIAB hides tracks.
- If I then turn those tracks on and exit...when I open BIAB again it turns them off again.

This is extremely annoying! We have gotten used to seeing the mixer with bass as #1, drums as #3 and so on. Now I have to look closer to see what tracks are actually displayed.

One of the primary rules of good GUI design is don't hide things programmatically. Letting the user control visibility of an item is fine but automatically hiding something like a mixer track seems absurd to me.