Would be great, if we could set a background.PNG image to use as bezel/background when it's displayed at full screen.
Also would be great if we could set a "display size ratio" in the config (like x2, x4, x8 , ...) for when NOT displayed at full screen.

Just discovered this tool and I'm blown away.  Very slick, thank you!  I agree with Dale though, it would be so amazing to have the custom backgrounds in fullscreen.  We could do some fun stuff with that! :)  Thanks again for sharing this.