Starting from Acid 1.3.1 you can set a full size image as a background for your One Page sections.
To do this, follow these steps:
- Create a new page
- Locate the Featured Image module and click the ‘Set featured image’ link. This will open up the usual WordPress image uploader where you will upload your image.
- In the Page Attributes module, set the page template to One Page Child: Cover Photo
- Navigate to Appearance > Menus and add the new cover photo page to your One-Page Layout menu
Note: Do not set the width for the page in which you uploaded the image. Set the ‘Display Page Title’ to “no” if you don’t want the image to have a the vertical title bar.