@ Richard

I'm not sure I fully understand the request...

Right clicking the thumbnails opens a 'restricted' size pop-up window, which is strictly for 'Camera View' zoom adjustment, but I agree, it would be nice if it previewed the "Live" set.
Double left clicking the 'Input' opens up the settings window (same as clicking the cog wheel) which is a size adjustable window, perfect for 'fine tuning' the elements in a "set-up".
I have not experienced the "the angle returned to it's original setting (in the .xml file)". The "Edits" in either window perform as I would expect and appear to be 'remembered' for me, so I am unsure why it's not for you.

Overall, one has to realize that the 'Virtual Set' is essentially a "MultiView" input and thus any adjustment to any layer should be made to the appropriate overlay channel of the input.
I agree that it can be frustrating when going in to make adjustments since the 'Settings' window always opens up to the last settings page it was on, regardless of the 'Input', so if you last adjusted the "main" position of "Input #1" and then jump to alter the position of "Talent" in your 'Virtual Set', if you don't select the appropriate overlay channel, you will 'inadvertently' be changing the "main" position instead of the position of the "Talent" overlay channel (I have experienced this many times).
However, I'm not sure if there is an "easy" fix, or if it even should be changed at all (such as the 'Settings' window always defaulting to the "General" page and forcing you to navigate where you want to go, either way has advantages and disadvantages).
As with a lot of things in vMix, I don't initially find them "intuitive", but once I have a better understanding of the "logic" behind them, I fully appreciate the "POWER" Martin has built into his program.


Ice