How do I check whether a catalog is up to date with the product category master in V5?

1. In the “Categories and products” dialog, click “Check product category master…” to start the comparison. 2. When “Comparing with product category master…” appears, wait for the comparison to finish. 3. If “The catalog is up to date with the product category master” appears, this check found no subcategories or published products that have yet to be added.