Handling hierarchical items in the Catalog Folders
In the Catalog Folders section in the Organize panel, you may have several hierarchies of folders that contain your media files. A key option called Union of Folder Hierarchies, located in the Configure Folder Watching menu in the Catalog Folders section, enables you to view the total number of media items located in a particular hierarchy.
For example, suppose that you have a hierarchy of folders in the path Users\Photograper1\Pictures\Animals, where images actually only reside in the Animals folder.
If you do not select the Union of Folder Hierarchies option, the Catalog Folders section displays only the number of media files associated with each subfolder of any hierarchical folder group.
However, if you select the Union of Folder Hierarchies option, the higher levels of any hierarchical metadata group in the Catalog Folders section display, in parentheses, the aggregate number of media items associated with any subfolders of the hierarchy.
When you select the Union of Folder Hierarchies option, you will see the sum of files in a particular category in parentheses. You can filter files by that category.
To select or clear the Union of Field Hierarchies option
On the Configure Folder Watching menu at the top of the Catalog Folders section, click Union of Folder Hierarchies.
To remove higher levels of folder hierarchies from view
On the Configure Folder Watching menu at the top of the Catalog Folders section, click Trim Folder Hierarchy.