How to add a Static Background Image
Step 1: Add the image you wish to use with the Add Resource button.
Step 2: Open the Page Inspector with the Page Info button.
Step 3: Click on the Header tab.
Step 4: Add the following text to the Header-Header Section: {image : '%resource(background.jpg)%’}
*Make sure the resource name matches the name in your resources section
Preview and you are done!