I'm on night 3 of trying to solve this. I have launchbox on my laptop, hooked up to a TV screen. Running MAME. Everything has been running fine when I duplicated displays. I now want to extend displays so I can use the other screen.
I set the TV to my primary screen in my Windows Display Settings. I set the Primary Display to Display2 within BigBox. When I open BigBox, it opens on the TV. When I open a game (have tried a few), it opens on the Laptop monitor...
I've tried toggling on and off Marquee screen.
I've tried changing the .ini file. I ran cmd and discovered my monitors were \\.\display1 and 4. I changed "screen", "screen0", etc. to \\.\display4. I tried changing numscreens to 2. I've restarted the computer. No matter what I've done it always opens the game on the laptop. I've read 2 threads on this forum, reddit, others, and have tried everything suggested. Any other ideas?