P: Reference View: need more flexible options for Zoom in reference photo

In Reference View, I would like the option to Zoom in on the Reference Photo in the same way I Zoom in on the Active photo.  Ideally this would work like Sync in Compare View.

My use case: I want to evaluate two different approaches to enhancing color in two versions of the same window.  I would like to be able to edit the photo in the Active window as I make the comparison.  The 100% Zoom option for the Refernce window is shows too small an area.  I need the flexibility to use the normal Develop Zoom tools, ideally synchronized across both photos for efficient working.