So, in classical (Greco-Roman) visual arts there were some pretty serious studies about proportions and how to portray humans. This is why there are some pretty distinguishable styles. This one I think is an example of contrapposto, which is supposed to give the idea of movement, and increases perceived attractiveness. Not different from modern day influencer posing to take photos that, to our eyes, look very natural but make them prettier.

It literally says on the image you sent how to do it with a digital display (besides, it’s pretty reasonable)

Nope there’s a feature that lets you download the screenshot to your phone wirelessly

Aren’t these just German words?