Hey nsm!
Maybe you mean that you would like your footer to be fixed, so it's like an overlay?
In "Lay Options" -> "Custom CSS & HTML" you can try this CSS in "Custom CSS for desktop version":
#footer-region{
position: fixed;
bottom: 0;
left: 0;
width: 100%;
}
Since your footer is 106px high right now you would need to also add this css:
#main-region{
padding-bottom: 106px;
}
You can try without that padding-bottom css and scroll to the bottom of the page to see the difference.
Hope that helps! :)