When you are in the creation part of your album, you just need to create your layout on a page. To do this you can use images, backgrounds...
Once your masterpiece is ready, a right-click on your mouse then click on Save this layout.
This will then be saved in the Recommended Models
To apply it, go to the page you want to modify and then click on your personal layout, it will then apply automatically.
A right-click on the personal layout will allow you to apply it to all pages at the same time.