Compacting the catalog does not remove clips from your hard disk or from Microsoft Clip Organizer, but will only compact your primary Clip Organizer catalog. This catalog contains the thumbnail-sized clip previews and other clip property data. If you want to remove installed clips from your computer to save space, you must uninstall them using the program they were installed with.
On the Tools menu, click Compact.
Note: Compacting performs many routine checks on your Clip Organizer data, such as repairing any data corruption in the primary Clip Organizer catalog. If you experience problems such as corrupted data error messages or missing clips, using Compact may resolve the problem.