How to Set Up a Second Monitor for More Desk Space
A second monitor gives you more room to work. You can keep a document on one screen and a browser or video call on the other, which saves time switching windows. Setting it up takes a few minutes if you know which cable to use and how to arrange the displays.
Check the connections
| Port on your computer | What to use |
|---|---|
| HDMI | An HDMI cable to a monitor with HDMI |
| DisplayPort or USB-C with video | A DisplayPort or USB-C cable, or an adapter |
| Thunderbolt | A Thunderbolt or USB-C cable that supports video |
Check that your computer's graphics support more than one display. Most modern laptops and desktops do. If you use a laptop, a USB-C docking station can connect the second monitor and provide other ports as well.
Windows setup
- Connect the monitor and turn it on. Windows usually detects it automatically.
- If it does not appear, press Windows key + P and choose Extend.
- Open Settings, then System, then Display. Drag the screen boxes to match the physical layout on your desk.
- Set each screen to its recommended resolution and a comfortable scale, such as 125% for a small laptop screen.
Mac setup
- Connect the display and check that it is on.
- Open System Settings, then Displays. Choose Arrangement and drag the screens so they match your desk.
- Set the main display, which holds the menu bar and the Dock.
Arranging your desk
- Place the main monitor directly in front of you, with its top edge at about eye level.
- Put the second monitor to the side, at the same height and about the same distance.
- Angle the screens slightly towards you to reduce neck strain.
Common problems
- Screen flickers: try a different cable or update the graphics driver.
- Text is blurry: check that the scale and resolution match the monitor's native settings.
- Mouse moves to the wrong screen: rearrange the displays to match the physical layout.
Frequently asked questions
Can I use a TV as a second monitor?
Yes, through HDMI, but the picture may need manual setting for sharpness and scale. A dedicated monitor is usually better for text.
Do the two monitors need to match?
No, but matching size and resolution makes the desk look neater and avoids differences in text size when you move windows between them.
For posture advice when working for long periods, read typing posture.
Matching the refresh rate
If the two monitors have different refresh rates, moving the mouse between them can look uneven, and video can judder. Where possible, set both screens to the same refresh rate. Gamers often notice this most, but it also affects scrolling and dragging windows in everyday work.
Using two screens for work
Put reference material, such as a web page or a document you are copying from, on one screen and your main editing window on the other. Keep chat and video calls on the smaller screen so they do not cover your work. Many people also use the second screen for a dashboard, music player or to-do list.
Related reading
- Windows 11 Tips for Beginners: Everyday Windows 11 tips: the taskbar, Snap layouts, the clipboard, Focus sessions, file search and keyboard shortcuts that save time.
- How to Update Your Computer Safely: Why updates matter, how to install Windows and Mac updates and driver updates safely, and what to do if an update causes a problem.
- What Is a File Extension and Why It Matters: What the letters after a file name mean, how file types open in different programs, and how to show extensions on Windows and Mac.