I've been using these color markers for several years. Prob saw it on that video...
I used to have to 'mute' this color track to not have it sound.
What I do now is put 1 midi note in the clip, then drop the volume down to zero. As I copy/paste that clip for different sections of the song, I'll change the background/foreground colors via the inspector. Never have to mute again.
Chord track! Love it and will incorporate in the future. Just too hard to see chord symbols as a name for a marker.
Michael