Using Related Data Fields in the iPhoto Library
You can quickly create a related data field based on the iPhoto library by dragging iPhoto library icon onto a form in another library.
Illustration of dragging collection in iPhoto library to form in Projects library to create related data field
In a related data field based on the iPhoto library, you can’t create or delete records.
When you add records to a related data field, you can view them within the related data field in a grid layout (which displays media fields only) or a table (which displays media fields as thumbnails).
Illustration of two ways to view related records when adding them to related data field