You have eight templates to choose from for the Photo Cover design: Cosmos, Reef, Bondi, West, Oakwood, Classic, Edge, and Anchor. You can see a preview of how these templates look on your Photo Cover under the Change Cover Photo tab by simply clicking on each one.
Changing the Photo Cover
Option 1: Through the Design tab in the Collection Settings (also accessed by clicking on "Change Cover") by selecting Change photo (as shown above). This allows you to upload a brand new photo, directly to the Photo Cover.
Option 2: By selecting one of the images you have already uploaded to the Collection. Simply click the image you'd like to use as the Photo Cover, and then use the "More" button to select "Make Cover":