Image in the Background

I use the Artbees Wordpress Theme Jupiter.
And I want to insert a image in the background and the content in the front must be srolling over the image in the background.
Ad example:

How can I solve this issue?
Thanks for your help.

Thanks felsenhau

for doing this you have to use Parallax Background. If you don’t know how to work with Parallax Background then you can hire any freelancer and I would certainly recommend one of the WordPress experts at Envato Studio. They’re really good and surprisingly affordable.