Set a background color or image for the entire content area
You can set a background color or image for the entire content area -- the area between the header and footer. For images, you have the typical choice of properties: whether the image repeats, how it is sized for the screen, and whether it scrolls with the content or stays fixed in place.
The background color or image is set in Customize > Content > Content Background. See the Related Articles for more details.
Tip: If you only want to fill part of the content area with a background color or image, use Page Builder to set the color or image on rows or columns.