Author Pro lets you add a unique background image for every Post and Page on your site. Images added this way will override the background image or texture set via the Customizer.
To add a page-specific background image:
- Visit the Posts menu
- Locate and click on the Post you want to add a background image to
- Scroll down the page until you see the Background Image box below the Featured Image box
- Click on the Set background image link
- Use the media manager to upload a new image or select an existing image, and click the Select button
- Scroll up the page and click the Update button to save your Background Image
Your Post will now display the new background image.