I have created a massive collection of over 400 photos that I want to then create a book with Blurb within LR CC. When I automatically generated the book, about 45 photos were not included (per the prompt from LR). But I am unable to see what photos from the collection were not used (an thus I would want to manually place into the book). This is the first time using this feature in LR. Past books were created with the free software from Blurb. Any tips and suggestions are much appreciated. Thanks.
If you look in the Filmstrip in Book, each photo will have number above it, indicating the number of times it has been used in the book.
Also, in the Filmstrip at the lower right is the filter drop down box - one of the built in filters is "Unused".
Thanks for the responses, but it is still not showing me the 44 images that were not included in the auto-generated book. I went ahead and reset the default pages to include layouts with multiple images and re-auto generated the book so that it would include all 402 images.