Responsive mode for shapely parallalax section

I’m wondering what I can do for my parallalax section to be responsive on a phone. For now, my phone doesn’t show the entire picture but only a part of it (kind of zoom). I would like the entire parallalax sections backgrounds and not only a part of the picture also on my phone. Is it possible please ?

Thank you a lot

Hi there

Which picture? this is what I have and I think it’s perfect: Screenshot by Lightshot

This one and the other one (with the scroll effect). I don’t see like this


Yes, im sorry but there is no predefined options to control their appearance, basically this is parallax BG and css cant change parameters for it