Somehow I have activated something that put a blue line along an entire audio track. It makes it impossible to adjust the volume all along the track--the volume is stuck at maxium. Hovering over the line "mute" pops up.
What is this feature and how do you de-activate it?
There's also the 'event gain', which is another blue line (w/event not selected), though thinner than the Volume envelope. The volume envelope's line color can be changed in the 'Options> Preferences> Display' menu, that others can't, AFAIK.