First let me explain my setup. I'm running my main monitor in portrait mode and my 2nd monitor in landscape. I have them stacked on top of each other. This is for visual pinball. I have all my vertical games opening on my playfield monitor and all my horizontal games opening on my backglass monitor. MY problem is i want big box on my backglass monitor. I've used the monitor selection in bigbox options and it is not changeing anything. If i turn off portrait and enter both screens in landscape it works fine, but with portrait enabled it's not adding screen to intended target. The strange thing is if i put it in landscape open big box it goes where it's suppose to go then once it's open i can flip the monitor back to portrait and it works the way i want it to. I don't know i guess i can use the work around but none the less i think this is a bug.