Activate Next Track Alternative    ⌃⌥↑

Switch to the next track alternative. I have used project alternatives extensively for my live recordings. Track alternatives are arrangement tools. All of the tracks share the same channel strip and settings.

Use track alternatives in Logic Pro — Apple Support

You can create and edit track alternatives and switch between them. Each alternative can contain different regions or arrangements, while sharing the same channel strip and plug-ins. Track alternatives are like “playlists” for individual tracks that can be used to try out different ideas or archive tracks at different stages of development.