Multiple Video Tracks in the Timeline

Sync and Video : Working with Video in Pro Tools : Video Tracks : Multiple Video Tracks in the Timeline

Multiple Video Tracks in the Timeline

(Pro Tools HD, Pro Tools with Complete Production Toolkit, and Pro Tools with an Avid Video Peripheral Only)

You can add multiple video tracks to the Timeline, but only one video track can be played back at a time. This track is known as the main video track.