In yout multicam tuturial you write, "While watching the cameras in the preview window, Record a new track, calling out the cameras 2,3,1,3,2,etc. - each time hit the M key (dropping a marker). Go all the way, laying down markers and calling shots. When you stop, name your audio file "shots" or whatever you like." How do you watch several tracks in the preview window, so you can call out the track #? Am I missing something here?