Once you connect one or more monitors to your laptop, you can set up two or more monitors in Windows and specify which monitor you wish to use as the main one. Windows usually detects display devices connected to the laptop or PC automatically and assigns numbers to them. The main monitor is designated number 1. All others are numbered in ascending order.
Proceed as follows to set the ranking of monitors and adjust the screen arrangement in Windows to the physical position of the screens.
Step 1: Right-click on a free desktop area and select “Display” settings.
Step 2: Under “Display” and “Multiple displays” you will see display devices detected by Windows, e.g. one or more additional monitors. Click “Detect” if none are visible.