Toggle Hide Group 33

Toggle the visibility of channels and tracks that are members of group 33. That’s a lot of groups to remember.

Edit group membership in Logic Pro — Apple Support

You can add a channel strip to, or remove a channel strip from, single or multiple groups. You can also temporarily disable all group parameter links—applying a Group Clutch—to change the volume of an individual channel strip, for example.

NB Tracks are hidden when corresponding channels are hidden. In the Mixer window the channels are hidden only when the Mixer is in “Tracks” view.