Although you cannot change themes once your book has been created, you can customize any page in your book with the backgrounds and layouts of your choice at any time.
Click anywhere on the page to select it, then click on the Backgrounds tab in the sidebar on the right. From there, you can select a different background for the selected page from the theme that was initially selected, from another theme altogether, or any other background image in our collection. You can also use any of your own images as a background on a page if you wish.
Remember that you're not restricted to just our preset layouts. You can edit the pages in your project however you wish!
If you're just getting started and would like to choose a different theme altogether, you can delete the book you've created from your library and start fresh with a new theme.