@freemp31 - the common/standard way out of true full screen is the Esc key.
But it sounds like the PV window is 'over' sized, that's happened to me with other software.
What happens if you press Alt+space? The Window menu should pop, with Move, Minimise, Maximise etc. Try selecting Move, then move the window down and to the right with the arrow keys until you can the top and left edges. Hit return and resize with mouse
BR
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