To detect a second monitor manually on Windows 10, use these steps: Open Settings. Click on System. Click the Detect button to connect to the external monitor under the "Multiple displays" section.

If you see the toggle greyed out, you might have to enable HDR in Windows first — you can simply press Win + Alt + B to do it ...

I have a lg c2 tv as my main pc display via hdmi...then I have a msi monitor via display port as my 2nd monitor. The lg c2 is always shown as monitor 2 and the msi as monitor 1. I think it's a hdmi ...

With a tiling manager like FancyWM, every window finds its place automatically. Once it's running, you can open two apps, and they'll each take half the screen. Open more, and they'll keep arranging ...