1. Setting the Transparency for the Header and Footer Sections
Make sure you select the 'Page Header' container (1) and that the 'Make changes to All Elements' button is ON (2).
Click on the color picker (3) in the background section and set it to transparent. (4), then click on Choose.
Repeat the same procedure with the footer. Your pages should look like this.
2. Adding the Image or Texture Background
Click on 'Regular Page' and make sure that the 'Make changes to All Elements' button is set to ON if you want to apply the background image or texture to all pages.
Set it to OFF if you want to apply the background image or texture to just one page.
Select the background image from the media manager. For this example, we have selected a texture.
And that's all!