I currently run PinballX in Full Screen with Full Screen Windowed = Yes. However, I was going to try PinVol and that program states when utilizing it you need to run PinballX at Windowed mode with Full Screen Windowed = Yes. When I switched these settings, I ended up with a very small window in the middle of my desktop showing the PinballX main screen, my backglass in an unadjustable window in the top left, a dmd image in an unadjustable window in the top right and my high score plugin normal sized at the bottom. I'm running a 2 screen plus real DMD setup.
Also, when running in Windowed Mode, is it normal for the tabs and icons to still appear at the bottom of the screen?