Toggle Hide Group 37 – Logic Pro keyboard command of the day

  Toggle Hide Group 37

Show or hide the channels in group 37. There is no group 37. The maximum group number (currently) is 32.

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.

 Hiding groups hides channels in the mixer, and associated tracks in the Main Window.