how to screenshot from computer. If you're ever in a situation where you need to take a screenshot of something on your computer, there are a few different ways you can do it. You can use the Windows key + Print Screen (or PrtScr) shortcut, hold down the Alt key and press Print Screen, or hit the Ctrl+Shift+3 keyboard combination. Whichever way you choose, make sure that your screen is properly divided into an 8x6 grid before taking the screenshot. Once you've taken your screenshot, save it to your computer's hard drive by selecting File > Save As.