How do I add captions to my book?
On iOS: To add captions to your book, simply tap on a photo that you have already added to your book to open our page editor. Next, select the “Caption” tab from the bottom of the screen. After typing in your caption, tap “Done” at the bottom of the screen to save. If you have more captions to enter, tap the arrows on the left or right side of the screen to switch to another page. When you are finished, tap “Done” at the top of the screen to exit the page editor.
On Android: To add captions to your photos simply tap on a photo that you have added to your book and select the option to “Add Caption”.