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If you want to enlarge your desktop display and use your laptop as a second or third monitor for your computer, we show you how. While this may seem like a simple process where you have to connect your desktop to your laptop with an HDMI cable (or other video input cable), the reality is that it doesn’t work that way. The HDMI port (or VGA, or DVI, or display port) on your laptop will only serve to output its display and will not act as video input for any other device.
This means that if you want to display your laptop screen on a larger display (TV, monitor, projector, etc.) or connect it to another display to enhance your laptop’s performance. So, you can do this by simply connecting the additional display to your laptop. . However, you cannot connect your laptop to your PC with a cable so that you can display your laptop to your computer. LAPTOP AS A MONITOR

Therefore, in order for your laptop’s display to act as a monitor for another device, you must either use the built-in features in Windows or use third-party software to make both devices work properly. Should be done. Should be. And, in this guide, we will show you different options for configuring your laptop as another display or its primary display for your computer.

How to use another laptop as a second monitor to extend your computer’s display

Using Merchant on Windows Systems
The first option is to use the Mericast feature which can be found on Windows devices. To set it up you need to do the following.
You want to use it as a secondary display on the laptop
1. Click the Start menu and go to Settings (Gear Icon)
2. From there, click on the system icon
Then. Then click on the “Present this PC” option in the menu on the left
Make sure you change the first drop-down menu to Available (you have two different options)
5. Customize other settings to your liking
6. When this is done, return to the main PC for which you want to configure your laptop as a secondary display.
* Note: If you receive a red error message that says “Serve on this PC.” We are still trying to determine the merits of this feature. Check out this thread on the Microsoft Help Forums for a possible solution. I had to go to my Device Manager and install and uninstall the Microsoft Wi-Fi Direct Virtual Adapter to fix this error message and give me the option to configure “Present on PC”.
Secondary to the main PC for which you want to use your laptop display as a secondary display
1. Click the Notifications / Action Center icon in the bottom right corner of the taskbar
2. Click Connect on the menu at the bottom of the notification slideout menu
When. When the laptop you want to connect to appears, select it
4. Then go back to your laptop and accept the connection
Finally. Finally, on your main PC, right-click on your desktop and select ‘Display Settings.’
6. From the Display menu, make sure that under the ‘Multiple Displays’ section, you have chosen to expand the desktop in this display.
7. Next, adjust your desktop and laptop display correctly by dragging and dropping the display icons at the top of the ‘Display Settings’ screen.
Some compatibility issues with Merchant
Not everyone will be able to use Merck. I had trouble connecting my laptop using Miracast because it requires the use of Intel HD Graphics and since I have a dedicated graphics card for it in my system I can’t use it.
Your desktop PC will also need to use a wireless connection to connect to the laptop. Since I use an Ethernet connection and don’t ship to Wi-Fi, I have to use a wireless adapter to use my laptop as an additional display.

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