This allows you to take a screen shot of what is currently visible on your computer screen. How you can do this will vary depending on the device. Some keyboards have a print screen button, others do not. This will save as an image which you can then insert or ‘paste’ into an email, Word document, or Powerpoint, for example. To print screen on Mac, hold down ‘command’ and ‘shift’ and ‘3’. The you can paste it into a Word document or email.
On a PC:
On a Mac: