Even though Microsoft remains silent on the Windows 8 usage scenarios and Windows 8 RT hardware is not yet publicly available (hence no one ever posted this tip before), we have just learned something what concerned us for a while.
How do you take a screenshot on a Windows 8 RT (Arm) device that has no mouse and is unable to use Snipping Tool?
It’s simple; all you have to do is press:
Window Key + Volume Down