Hmm, yes it works in window but I can't still use full screen mode?
Oh, I can use fullscreen AFTER I have set the correct resolution. However try to add some 1920x1080 background to your application and change resolution, there is some white area?
I turned unbounded scrolling off, set layout color to black and now I can see the whole window area. However there is only one black aspect ratio bar and it's below the image. Like this:
Here is my example. Works well but contains only one black aspect ratio bar:
Here is another example. I turned unbounded scrolling on and set ScrollX to 1920 / 2 and Scroll Y to 1080 / 2. I think it should work now, image is in the middle of the screen.