Quick answer: Plug the second monitor into an HDMI, DisplayPort or USB-C port, then open Settings > System > Display in Windows 11. Choose Extend, drag the screens to match your desk, and click Apply. Press Windows key + P for a fast switch between modes.
A second screen is one of the cheapest ways to get more done. You can keep email on one display and a document on the other, or run a video call beside your work.
The steps below work on Windows 11 and, with small menu differences, on Windows 10. They apply to home users in any region. Prices and cable types vary by shop, so check what your PC and monitor offer first.
What do I need before I start?
You need a video port on the PC and a matching one on each monitor. Dell lists VGA, DVI, HDMI, DisplayPort and USB-C (with DisplayPort or Thunderbolt 3 support). Windows Central recommends DisplayPort on Windows 10 where available.
- Laptops generally support up to two monitors, depending on specs, per Dell. Desktop graphics cards often support more.
- Check your PC’s ports before buying a monitor or cable.
- A docking station can add video outputs to a laptop.
How do I connect a second monitor?
- Connect the monitor’s power cable and video cable, then turn it on.
- Make sure the cables are secure. Windows should detect the screen and show the desktop.
- Press Windows key + P and pick a mode.
The four modes, according to Dell, are PC screen only, Duplicate, Extend and Second screen only. Choose Extend for one desktop across both screens. Dell notes that a second monitor on a Dell laptop defaults to Duplicate, while a Dell desktop defaults to Extend.
How do I arrange the screens in Windows 11?
- Go to Settings > System > Display.
- Click Identify to see which number is which monitor.
- Drag each display so it matches its physical position on your desk.
- Line up the tops of the displays. Windows Central warns that otherwise the mouse may get stuck at the corners.
- Click Apply.
To set your main display, select the other monitor, open Multiple displays and check “Make this my main display.”
How do I fix resolution, text size and refresh rate?
Select each monitor in Settings > System > Display and adjust these under Scale & layout:
- Display resolution: choose the monitor’s recommended setting for the sharpest picture.
- Scale: set a different scale on each screen if text looks too big or small. Custom scaling runs from 100 to 500 percent and needs a sign-out.
- Orientation: landscape or portrait.
- Refresh rate: open Advanced display settings, choose the monitor and pick a rate. The Dynamic option appears only if the monitor supports variable refresh rate.
What settings make two screens easier to use?
- Taskbar: under Settings > Personalization > Taskbar > Taskbar behaviors, check “Show my taskbar on all displays.”
- Window memory: in Multiple displays, enable “Remember window locations based on monitor connection” and “Minimize windows when a monitor is disconnected.” This helps if you use a laptop on and off a desk.
- Move windows: Dell lists Windows key + Page Up or Page Down for moving windows between screens.
- HDR and color: if your monitor supports HDR, XDA Developers says to use the HDR option in display settings and follow the on-screen steps. Brightness and color profile settings may not be available on every monitor.
- Wallpaper: in Personalization, use a panoramic image and set “Choose a fit” to Span.
If you move the taskbar, see our guide to moving the taskbar in Windows 11.
What if the second monitor is not detected?
Windows Central suggests this order:
- Check power and cables, then reseat both ends.
- In Settings > System > Display, open Multiple displays and click Detect.
- Restart the PC.
- Install video driver updates through Settings > Windows Update > Advanced options > Optional updates. A black screen is usually a video driver issue.
Dell adds that after a Windows upgrade you can uninstall the video driver, update the BIOS, install the latest graphics driver from the maker and restart. Make sure your system is healthy too: Microsoft’s performance tips include checking for optional driver updates and closing unused apps. Our guide on checking SSD and hard drive health helps if your PC feels slow with two screens, and more are in our more computing guides.
Frequently asked questions
Can I use a TV as a second monitor?
Yes, if your PC’s video output matches an input on the TV. Dell notes this works the same way as a monitor.
Why does my mouse get stuck between screens?
The screen tops are probably not aligned in the display layout. Drag them level in Settings > System > Display and click Apply.
How many monitors can my laptop run?
Dell says laptops generally support up to two external monitors, depending on specs. Check your model’s manual to be sure.
What is the shortcut to switch display modes?
Press Windows key + P and choose PC screen only, Duplicate, Extend or Second screen only.