Quite few times i encountered some pre-recorded material that needs to be zoomed and repositioned for various purposes.
Once i add a multiview overlay it inherits main sources scale and position adjustments - which is cool.

But i would like to see a "fit to window" or "keep aspect and position" option for multiview layers in position settings as adjusting it back to fit the screen can be painstaking process?
Think this could be useful in lets say 4k input > 1080p output PTZ workflows where one camera source can be scaled and repositioned to provide an additional frame w/o the need for new virtual input.