# Example: Combining category elements

This scenario shows an example of combining categories that are used at different sites.

Company B has sites in New York, Toronto, and Mexico City. The company’s administrators have defined separate Categories for the elements that belong to each site, because administrators usually work with the elements of one site at a time. Today, however, Administrator A must apply the same configuration changes to the New York and Toronto sites. Administrator A does not want to create a Category for this temporary need. To be able to filter the elements belonging to both the New York and Toronto sites, Administrator A does the following:

1. Creates a custom Category Filter that contains the New York and Toronto Categories. The elements at both the New York and Toronto sites are displayed, and elements in the Mexico City Category are filtered out.
2. Makes the configuration changes to the elements in the New York and Toronto sites.
3. Selects the Category Filter Not Used filter to display all elements again.