Yeah, I tried that… same result as clicking the “video scope” under the View tab. I did however finally find the scope.
I run a 3 monitor configuration and the video scope was behind my preview window on my 3rd monitor. I moved it back to where it belonged and saved the config.
How it got there I’ll never know!
A “put on top” feature, assignable to individual windows, might be a good idea for 10d.