There are certain text areas in BookSmart that you can lock or unlock: the spine, page headers, and page numbers.
Locking these text areas means that the text will automatically update to be consistent with your book’s Title, Subtitle, Author Name, or page count.
Unlocking these text areas allows you to manually change the text or page numbers. You can lock or unlock the areas by clicking on the text area to make a lock icon appear. Then click on the lock icon to toggle between “locked” and “unlocked.”