Your Bookify project will automatically open with 20 pages, but if you've got more to say, look for the Add Pages icon on the left side of Bookify.
You can also add pages from the Manage Pages view by clicking the Add Pages buttons, as seen below:
To remove a page from your Bookify project, you need to be in the Manage Pages view. Click on the page that you want to remove and you will see a trash can icon. Click on the trash can icon to delete that page.