how do I take a screen shot on my android, ulefone Vienna

[AC Question]

I have tried several options like swiping the screen with 3 fingers etc, nothing seems to work.

 

[anon(9983233)]

Possible Solution:

Ulefone Metal – Rich Ways for Screenshot | ulefone Blog

Note: Although this blog post speaks about the "metal" smart phone. I would suspect taking a screen shot can be done in the same manor.