How to Use a Laptop as a Monitor: Extending Your Display (Updated for 2026)

If you’re looking to up your productivity at work or improve your gaming setup, adding a second laptop to your desk can be a significant benefit. Combining two screens can allow you to view much more at better speeds. But how do you use a laptop as a monitor?

Extending your display is a great way to increase your efficiency and viewing capabilities. Here is a look at how to use a laptop as a monitor.

What Laptops Have Dual-Screen Capabilities?

Once you decide to use a laptop as a monitor, you may be wondering if your laptop can automatically handle two or three screens at the same time. The answer is some can, while others may need a little extra help.

On Windows operating systems, you can check by going to the settings and seeing if you can choose multiple displays. Most PCs made after 2010 should have the graphics cards necessary to support more than one screen.

Macbooks may have a bit more trouble. While more recent laptops can support more than two external displays, specific models require more wires. You can check your Mac’s capabilities by searching Apple’s tech specs and scrolling down to Video Support or Display Support. The website should then tell you how many external monitors your laptop can use.

How to Use a Laptop as a Monitor

The methods for connecting a second laptop to your primary one differ between types and models. Whether you use Windows or iOS, here are the ways you can use a laptop as a monitor.

Windows 10 or Later

If you’re running Windows on version 10 or later, connecting a second monitor will be a snap. All you have to do is go into the Settings on the laptop you’ll use as a second screen, click System and select Projecting to This PC. There will be a few security adjustments you can make, which HP explains on their website.

Then, return to the laptop you’ll use as your central work station and hold down Windows Key + P. To have two separate displays, click Extend and select the secondary laptop. You should now be ready to calibrate the monitor’s displays and get to work.

Windows 8 or Earlier

You might be able to use the Extend feature on laptops with an operating system earlier than Windows 10. If you can’t, you’ll need to get a Microsoft Wireless Display Adapter.

To use it, you should first download the app of the same name from the Microsoft store. Then, plug the USB and HDMI ends into your secondary laptop. You should then see the adapter show up on your primary device and be able to connect to it.

iOS Apple Devices

Macbooks get a little more complicated. You’ll have to check the specs of your specific model to see how many external monitors it can support. Additionally, the wires you need depend on the chips or ports your laptop has. For example, one with the M1 chip will need an HDMI cable, while one with a Thunderbolt port will need an adapter along with an HDMI or VGA cord.

Once you have the two devices plugged into each other, your primary laptop should pick up the second screen. You can go into System Preferences, click Displays and go into Detect Displays if you need to do this manually.

Steps to use Miracast to Project from PC to Laptop

Miracast is a technology that allows you to project your PC’s screen into a laptop wirelessly. Some devices already come with this feature enabled. Here’s how you can set it up and enable your laptop to receive projections from other devices.

Check Your Laptop’s Wireless Display Capability

On the laptop you want to use as the second screen, open Settings > System > Optional Features. Click the “View Features” button beside “View or edit optional features” and search for “Wireless Display” under “Available Features.” If it’s there, your laptop is Miracast-enabled.

Install the Wireless Display Feature on Your Laptop

If you can’t find the Wireless Display feature under your laptop’s existing features, you need to install it manually. Click “See available features” above the added features search bar and type in “Wireless Display.” Mark the check box and click “Add.” Wait until it finishes installing.

Set Your Laptop to Receive the Projection

Select System > Projecting to this PC. Here, you can customize how you want your PC or other devices to connect to your laptop. You can make it available everywhere or only on secure networks, set whether other devices need a PIN or permission to connect, etc.

Connect From Your PC

When you’re ready to project, click “Launch the Wireless Display app to project to this PC. Other devices can now pair with your laptop and use it as a secondary display.

Can You Connect Mac and Windows?

While the two tech giants are somewhat rivals, you can work to connect Macbook and Windows laptops as dual monitors.

Apple has a setup guide because you’ll need to set the two computers up to share files with each other. Then, you can connect them wirelessly or by using an Ethernet cable. The connectivity likely depends on the Macbook’s release year, so if the wireless method doesn’t seem possible, find a reliable Ethernet cord along with an adapter if necessary.

Troubleshooting When a Laptop Won’t Accept External Display Input

If your external display isn’t working properly, consider the following checks to see if there’s an easy fix:

• Check your projection mode: Use the Windows Key + P (on Windows) or check the Displays menu in Control Center (on Mac) to select “Extend” or “Duplicate”
• Restart both devices: A simple reboot of both laptops or PCs can often resolve temporary connection glitches
• Verify your Wi-Fi connection: If you are using a wireless method like Miracast, confirm that both devices are connected to the same Wi-Fi network
• Check hardware compatibility: For wireless connections, confirm that both devices support the wireless display technology
• Update network drivers: Go to Device Manager, find your network adapter, and check for driver updates
• Inspect cables and adapters: For wired connections, try using a different cable or port if available and ensure the cable is securely plugged into both devices

Use a Laptop as a Monitor to Increase Your Productivity

Splitting your screen can be a pain when you’re trying to work or game efficiently. Having two laptops in an extended display allows you to see what you need without needing to leave a program or flip through tabs. Use a laptop as a monitor and see how much more effective your setup can be.

Original Publish Date 11/11/2022 — Updated 12/02/2025