How to make a screen shot via the keyboard with protective case for Samsung A8?

Question from Jan-Willem Henfling of Nederland: Using with pleasure your keyboard with protective case for Samsung A8 obtained through GSMPunt. I am looking for the manual as a pdf. The info on the site is helpfull though for the time being. However it is unclear how to make a screen shot. Please explain. | Answer: keyboard with protective case for Samsung A8 doesn’t support screen shot.