Bring back the Source/Master Clip workflow to the new Color Mode interface

Bring back the Source/Master Clip workflow to the new Color Mode interface

I am testing the new Premiere Pro Beta, and while I like the idea of an updated color workspace, the current design breaks a vital professional workflow for long-form editors.

When editing an hour-long sequence with tons of cuts on my A-roll, I need to color the original source asset once so that it automatically updates every single cut across the entire timeline without affecting my B-roll. In the old Premiere layout, this was easy using the "Source" tab in the Lumetri Color panel.

The new Beta Color Mode removes this native Source/Clip toggle entirely. Forcing me to use the Effect Controls panel (which disconnects from the Lumetri Scopes) or manually group dozens of cuts is highly inefficient and creates unnecessary clicks. Please add a dedicated, native Source/Master Clip grading option directly inside the new Color Mode panel with fully integrated scope feedback before this moves out of Beta.