Background image

Having a hard time with my background image. I use Mantra on a couple of sites. On one site – same versions of WordPress and Mantra – I use a background image and the image is correct in that it is around the border of the site and not the content. See – https://www.wickenburgaz.biz.

On the other site the background image fills the entire screen and washes everything out including the content areas on presentation and other pages. I’ve checked and compared settings but can’t figure out why it displays differently from site to site.

How do I get the background image to display like the site above without it showing up in the content area?