I’d suggest to designate an area on the screen to the last show/scene that was loaded and is currently active (and if it was altered already) on all screens/layers.
I agree that knowing what scene has been loaded is a good idea, but A scene is altered the moment you move a fader, or change anything ! A scene is just a snapshot of a particular instance in time. This is the same on all A&H desks. So what you are working with is never the scene you loaded, unless you make absolutely no changes whatsoever!
It is therefore not possible to implement your second part.
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