One thing not mentioned and this may also be subject to the year version and PC/Mac differences between BiAB products but open RealTracks picker and select the button in the upper right corner <Medley> if you have it.
This amazing option will allow you to add up to an additional 10 instruments to any track. You can set when the instruments change out and you have the option to even have multiple instruments play simultaneously.
This feature works independently of Styles.
This feature provides 8 track BIAB to have up to 70 instruments in a project.
Also, if you convert tracks to audio, you do get timeline and navigation similar to what you see in a DAW when you are working on a single track.