Use the Schema Needs Reorg toolbar button to reorganize your current schema when it is marked for reorganization (indicated by a red light on the toolbar button).
When you click this button when it indicates that reorganization is required, the Classes Needing Reorg dialog is then displayed.
When the schema is not marked for reorganization, the toolbar button changes to a green light and bubble help for the button displays Reorg Is Not Required.
For details about reorganizing your database, see "Performing a Reorganization", in Chapter 3.