IMatch provides a special category formula named “@Unassigned” which returns all images not assigned to a category.
By default, IMatch creates a category named 1 Unassigned when you create a database. This category uses the @Unassigned formula to virtually contain all images not assigned to a category.
If you have deleted this category, you can re-create it as follows:
- Create a new category with a name to your liking directly under @All
- Right-click the new category and choose Properties
- In the category Expression field, type
- Close the dialog with OK
The new category now virtually contains all images not assigned to a category. Assignments to data-driven categories are automatically ignored by this formula.
Use this special category formula only once and always in a category which is a direct child of the @All category. Only under these conditions @Unassigned works as expected.
Other category formulas you may find useful: CatNoRecurse@, CatDistinct@, @Rating, @Label. More info on these formulas can be found in the IMatch help.