DaVinci Resolve 12.5.5 - Deselect Power Window When you're in the Color tab and have an active Power Window selected in the Viewer, is there a keyboard shortcut to toggle it on/off to see the unencumbered view of your clip?

"Deselect All" doesn't seem to deselect all.
You can use the key combination: Shift + `  (Shift and Backtick) to toggle the Power Window overlay on the [Color] page.

This also works for viewer overlays on the [Edit] page in Resolve 16.