Arranging Your Screens
1. Click on the start menu
2. Start typing and a search bar will pop up, type in Settings
3. Click on Settings
4. Click on System
5. Click on Display
6. Under the "Select and rearrange displays" section, drag and drop each display to rearrange them according to their physical layout on your desktop
(If you're not sure which monitor you're selecting, click the Identify button to figure out. If one of the monitors isn't showing up, make sure it's receiving power and connected correctly, and click the Detect button)
5. Click Apply