There is a green/gray selection bar that appears in the track timeline from time to time when I do something.  I don't know what it is and I don't want it, at least not right now.  I wish it would only appear if I take some explicit action to set it.  It's interfering with my attempts to transpose an entire track.  It will only transpose that part of the track.  Plus, it looks like a second sub-section of track 5 is being selected, and I don't know what that means.  Can somebody explain what's g