When the book preview is created, click 
in top right corner. Here you click on 
in top right corner of the cover photo and you’ll land on the editing page. Click on 
. At the bottom, you click the option “Replace” - now you can go through Suggestions, All Photos and Camera Roll.
Simply click the photo you want as your new cover picture! When you have clicked the new photo, you can adjust how you want it to be cropped. You can scroll up/down and use two fingers to zoom in and out.
Satisfied with the new cover picture? Great! Click the check mark in top right corner to save the changes.
If you have any questions, please don't hesitate to contact us!