When you upload an image, we store it temporarily in your image library. This gives you quick access to the last 30 images you've uploaded to your booklets. It helps you avoid the work of having to upload the same image again and again for your booklet.
To access the image library, go to the PAGE CONTENT tab and select IMAGE. Tap the second tab, IMAGE LIBRARY.
You will see thumbnails of the last 30 images you've uploaded. Tap on one to add it to your page.
You can delete images from your library by tapping the delete icon in the bottom right corner of your thumbnail image.