Why am I getting a warning about spine size in my photo book project?
If you’ve added extra pages, the spine of your book will get thicker — and that can affect the alignment of text and/or images on the cover and spine of your album.
If the spine size is going to change, the editor will prompt you to check your cover design. Just make sure your spine text fits neatly within the spine area and that the rest of your cover design appears centred correctly.