If you have a Surface Type Cover for your Surface Pro, you can use the PrtScn key to copy a screenshot to your clipboard.

You can use keyboard shortcuts, or the Screen Capture tool, to take full, partial or window screenshots on your Chromebook.

(with the modifying keys) but it didn't really work out as the 'take screenshot' key seems to close the very on-screen keyboard I wanted to take the screenshot of. Multiple Apple store employees were ...