If you’re running a multiple-monitor setup in Windows 10, it is important to let the operating systems know how they’re arranged in physical space so they work properly. Here’s how to do it.
How to Rearrange Your Displays
To set up the arrangement of your monitors, you’ll need to head to the Display settings page. To quickly access it, right-click on Windows 10’s desktop and select “Display settings.”
Alternately, you can open the Settings app by pressing Windows+i. Navigate to System > Display.
If you have more than one monitor hooked up, you will see a visual representation of the monitors as rectangles with numbers inside them. This simplified diagram represents the orientation of your monitors as Windows understands it. To change it, we need to change the diagram.
To reposition a display, click on its rectangle and drag where you want it in relation to the other monitors you connected.
If your displays have different resolutions, then the rectangles will be different sizes. It is useful to align the tops or bottoms of the two displays so the mouse cursor and windows you drag will move between them as you would expect. To do that, simply click and drag one of the monitor boxes until the top or bottom sides line up.
In the example scenario above, Display 2 is now to the left of Display 1. If you reach the left edge of Display 1, your mouse cursor, or the window you are dragging, will appear on the right edge of Display 2.
How to Change the Primary Monitor (Main Display)
In Windows 10, the “primary monitor” or “main display” is the monitor on which new windows and apps open up by default. You can change which monitor is the primary display from the same Settings > System > Display screen.
In Display settings, click on the rectangle representing the monitor that you want to designate the primary monitor in Display settings. Windows will highlight the box representing the selected monitor.
Scroll down on the Display pane in Settings and find the “Multiple Displays” section. Check the box next to “Make This My Main Display.”
If there is a greyed-out checkbox already there, it means that the monitor you selected is already the primary monitor.
If you want to change the main display back, first. select another monitor in Display settings by clicking on its rectangle. Scroll down, then check the “Make This My Main Display” box for that monitor.
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