How to make Slider Revolution so that for different device sizes, the background is still centered?

Question

Slider

Hello!
I have a problem with Slider Revolution on Wordpress
If in more detail then:
Images on the background of the slider, on the main page of the site are hard lame on mobiles and pads, it's a little funny, and not very much, how to make the background in Slider Revolution always be on middle?

Answer 1

Didn't see a problem. I went from the opera to the PC, changed the size of the browser window, then went from the phone - everything is displayed normally. Take a screenshot, use the arrow on it to indicate where exactly you have a problem.