About the multi-camera editing workflow
Premiere Pro lets you create a multi-camera source sequence using clips from multiple camera sources. You can synchronize clips by manually setting In points, Out points, or clip markers. Or you can use audio-based syncing to accurately align clips in a multi-camera sequence.
The Multi-camera mode in the Program Monitor lets you edit clips shot on multiple cameras from different angles. To display the multi-camera editing interface inside the Program Monitor, select Multi-camera from the pop-up menu in the Program Monitor. The Program Monitor's Multi-camera mode displays a fully composited output like the regular playback mode, displaying any applied effects during playback.