How to use an external monitor by keeping your laptop closed

Requirements for Using an External Monitor

Before diving in, let's make sure you've got everything you need. First up, you'll need the right cable to connect your laptop to your monitor. This could be HDMI, DisplayPort, USB-C, or Thunderbolt, depending on what ports both devices have. If they don't match, grab an adapter. They are inexpensive and easily available.

Your laptop will also need to stay powered while closed. Most laptops need to be plugged into their charger to work in this mode, so keep that power adapter handy. You'll also want an external keyboard and mouse since you won't have access to your laptop's built-in ones. Finally, make sure your laptop display output supports external monitors while the lid is closed; most laptops from the last decade do.

How to Set Up Clamshell Mode on Windows

Setting up laptop closed display mode on Windows is easy once you know where to look. Start by connecting your external monitor to your laptop using the appropriate cable. Make sure both devices are powered on and your laptop recognises the display.

Next, head to your Power Settings. Click the Start menu, search for "Control Panel," and select "Hardware and Sound." From there, click "Power Options" and look for "Choose what closing the lid does" in the left sidebar.

By default, Windows puts your laptop to sleep when you close the lid. Change this setting to "Do nothing" for when your computer is plugged in. Click "Save changes," and you're almost there.

Now for the external monitor setup: with your laptop still open, press Windows key + P to open the projection menu. Select "Second screen only" or "External display only." Your laptop screen will go dark, and everything will display on your external monitor. Once that's working, close your laptop lid.

How to Set Up Clamshell Mode on Mac

Mac users have it even easier. Apple designed the clamshell mode to work almost automatically. First, ensure your Mac is connected to power, and your external monitor is plugged in via the appropriate cable.

With your Mac closed, connect your external keyboard or mouse and give it a click or press a key. Your Mac will wake up, and your external display configuration will spring to life. The display should automatically appear on your monitor without any additional setup.

If you want to adjust display settings, open System Settings (or System Preferences on older macOS versions), then click "Displays." Here you can change the resolution, refresh rate, and arrangement settings. That's all there is to how to use an external monitor with your laptop closed on a Mac. The system handles most of the heavy lifting for you.

Tips for Better Performance

Want to optimise your setup? Here are some monitor connection tips: Always use the highest quality cable your devices support. USB-C and Thunderbolt offer the best performance and can even charge your laptop simultaneously. Keep your laptop's vents unobstructed. Even though it's closed, it still generates heat. 

Get a laptop stand that positions it vertically to improve airflow. This is especially important during intensive tasks like video editing or gaming. Check your display settings regularly. Make sure your external monitor is set to its native resolution and optimal refresh rate for the clearest image.

Conclusion

Using an external monitor with your laptop closed transforms your workspace into a streamlined, professional setup. Whether you're on Windows or Mac, the process is simple. With the right cables, proper power settings, and a few performance tweaks, you'll enjoy the benefits of a larger screen without the clutter of multiple displays.