To activate it, you'll have to dive into the accessibility settings under Settings > Accessibility > Keyboard. Scroll down about halfway, and there's an option to tie Print Screen to the Snipping ...

On most laptop keyboards, you must press and hold the "Function" key to activate the "Print Screen" key. Press "Win-PrtScn" at the same time. If you're using a laptop keyboard, press the "Fn" key ...

Changing settings to allow the standard print screen button to activate image snipping is best accomplished by accessing two separate configuration screens.