Take a Screenshot on Microsoft Surface

Photo source:  www.pcadvisor.co.uk

To take a screen you need to press and hold the Windows button, and while still pressing, press down on the lower volume button. 
When you press the buttons correctly, you will see your screen dim for a second as if the shutter on a camera went off. The picture will then appear in the Screenshots folder of Photos app. The files will also appear in your My Pictures folder on your hard drive. This location is C:\Users\\My Pictures\Screenshots. You can also access these screenshots from your Pictures library, I guess you know that too.