What does it mean and what is it for to duplicate the screen of your PC

Despite the fact that the possibilities we have in terms of configurations of several monitors on PCs are very wide (given that we can connect a large number of screens to a single PC), the most common configuration is with two screensand we are going to base our tutorial on this premise, especially because when we talk about screen mirroring, it is actually the situation in which it makes the most sense.

How to mirror the screen on your PC or laptop

Before starting to get into the subject, it is essential to define what exactly the term “duplicate screen” means, although it is true that its name is already quite self-descriptive: literally, this technique will allow us to see twice an output signal from video on two or more screens simultaneously. In other words, we will have the image repeated, cloned or duplicated (whatever you want to call it) on several screens, which will show the same video image and at the same time.


In the image that we have placed above these lines you have a very clear example, in which we are doubling (or rather tripling) the screen of a laptop on two additional external monitors, making it look exactly the same in all three places ( in this case the video sender is the laptop).

Prerequisites, what do you need to have?

We are talking about PCs, and therefore the requirement is logically that you have to have at least one PC and two monitors. In addition, the PC must have several video outputs to be able to connect both monitors, although it is true that there are also other techniques to duplicate the screen wirelessly, for which it would be necessary to use, for example, a wireless HDMI (with this system, connects an emitter to the video source and receivers to monitors).


When what you want is, for example, to mirror the screen of your PC or laptop on a television, some modern models support doing this even wirelessly, using the local WiFi connection. However, and we repeat, since what interests us is the PC ecosystem, it is what we are going to proceed to explain below. So stick with this: you need a PC with multiple video outputs, and as many monitors as you want to mirror, logically connected to the PC’s video outputs.

Configuration and commissioning

We assume that you already have the PC with the two monitors connected; Once that’s done, setting up screen mirroring is really quite simple, and in fact, Windows should detect both monitors automatically. Otherwise, right-click on any empty space on your desktop, then select “Display Settings.” There you will see that there is a section that says “Various screens” and that is where you should go by clicking the left mouse button to display it. Then, click on the Detect button that we indicated so that the operating system detects your monitors.

Set up multiple screens

Once the operating system detects your two screens, you can OK and close this window and then press the key combination WIN + P. When you do, you will see that a menu appears in the lower right corner of the main screen that will allow you to select how you want the second monitor to behave.

mirror screen

Here you have the following options:

  • PC screen only: The secondary monitor will be off and only the image will be displayed on the primary.
  • Duplicate: this is the option we are interested in to duplicate the screen; will make it look the same on both.
  • Enlarge: This is the extended desktop mode.
  • only second screen: Contrary to the first option, it will only display the image on the secondary screen.

Can a screen be mirrored and a third screen used as an extended desktop?

It is possible that you have more than two screens connected to the PC, and you want to duplicate one but use the other as an extended desktop… is it possible to make this configuration? The answer is yes. You will have to go back to “Screen settings” as we showed you in the previous step, and in the various screens menu you can select how you want each of them to behave.

What is screen mirroring for?

As we mentioned at the beginning, the normal thing when you have several monitors connected to the PC is to use them to have a larger viewing area and to be able to distribute the windows on several screens, so that, for example, you can be playing on one monitor while on the other. you have Discord or your favorite streaming tool. However, why would you want to see the same thing on two screens at the same time?

Present to others what you see on your PC screen

It is quite common to have a PC or laptop connected to a large television, especially in presentations (imagine that you are in a meeting and you want to show everyone a PPT presentation that you have on your PC). Similarly, this could be used to put multimedia content on your PC and see it on a large screen that is not normally the one you use for the PC.

mirror laptop screen

Use a larger, external monitor with your laptop

It is also very common for people who work with a laptop to feel uncomfortable using such a small screen for so long. For this reason, it is quite logical to want to connect the laptop to an external monitor (in addition to a keyboard and mouse) to be able to work more comfortably, and even at a higher resolution than the laptop screen itself has.

Laptop with external monitor

You can also duplicate the screen of your tablet or mobile

Another of the utilities that we can find in the screen mirroring mode is to transmit the content of your smartphone or tablet to a larger screen. Here, what we have explained to you before is gone, but if you think that you can have the PC on the main monitor and the mobile on the secondary screen, things change.

Smartphone to TV

As you can see, duplicating the PC screen can be very useful depending on the circumstances, and although it is true that it may not be as useful for everyday life as the extended desktop mode, it also has some utility and is just as easy to configure.

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