Set Solo Tool – Logic Pro keyboard command of the day

  Set Solo Tool

Simplest way to enter this command is to type ‘T’ ‘S’ on the keyboard.

I think there are some problems with soloing from the middle of a region. The display is wonky, and the transport LCD does not update properly.

Mute and solo regions in the Logic Pro Tracks area – Apple Support

The region plays in isolation from the pointer position until you release the mouse button.