You can customize the top background image in the Bedford template, but what you might not know is that you can add arbitrarily many full-bleed images throughout the page (i.e. images that stretch to take up the full width of the page). This is useful when creating long single-page websites.
The key to adding more full-bleed images is to create an Index page. Click Add Page and thenclick on the Index tile:
A new index page will appear in the sidebar. Now click on the Add Page button that’s nested underneath it:
This creates a sub-page that’s nested within the parent index page. You can create as many sub-pages as you want, and they’ll all be joined together into one page.
Now select the sub-page and click on Settings in the top right:
In the dialog, you can choose the image and customize what text appears over it:
This will setup the top image on the page. Repeat step 2 and 3 to add additional sub-pages to the index, which allows you to add more full-bleed background images.
Straightforward, but not very documented. That’s it!