Hi Mike!
Thanks a lot for your answer. I appreciate your helpful answers very much. :)

On the screen of iPhone 6s it fits perfect as long as I keep it vertical.
Horizontally, I see the picture on the left and there is a white background on the right side.

On the screen of iPhone 5 it doesn’t look nice at all.

May there is another solution, in which the picture on all mobile devices extends over the entire screen and looks beautiful?
Best regards,
Patrick

Hi!
I have put the URL in the private content area.

Thanks for your help.
Patrick