With Portrait Auto Flow you can set up and change the page layout for all of the portrait pages. This is how you can get just the right number of portraits on a page so they all fit in the book.
1. Log in and select Yearbooks and Edit Yearbook.
2. Select Edit Book or Edit.
3. Go to the page where a new layout is needed and select Portraits.
4. In Edit Portraits, select Photos Per Page. If you want all the portraits smaller to use less total pages, the photos per page should be a high number. If you want larger portraits, use a lower number.