If you’ve got a Windows 8 computer with a keyboard, taking a screen shot of modern Windows 8 apps is easy; you can just press the Windows and Print Screen keys together, much like you would if you were in the Desktop.
But if you are using a tablet device running Windows 8 or Windows 8.1, and you don’t have a keyboard, taking a screen shot while you are in the Modern UI (aka Metro interface) requires a little more effort than that. Mainly, you need to press a two-key combination, much like you do on an Android device (which requires you to press the power and Home buttons).
On a Windows 8 tablet, such as the Microsoft Surface, ASUS Transformer Book T100 and others, you have to press the physical Windows Home button along with the volume down button. Depending on your tablet, sometimes the Windows Home button can be along the front of the device, at the top, or on the side. It can be quite awkward to press this key combination on some devices, as you can see from the ASUS T100 that we used for the picture below.
The proper technique is to press the Windows Home button slightly before the volume down button. If you get it right, you will notice that the screen dims momentarily, which signifies that a screen shot has been successfully captured.
Using this method, you will be able to grab screenshots of full-screen apps that run in the Modern UI, and of an app’s settings. To see the screenshots, you can launch the Gallery from the Start screen and look in the Screenshots folder. Or, you can access them from the Desktop by going to the Pictures folder, and then to the Screenshots folder.