To Delete Unused Appearances

1. On the Manage tab Styles and Standards panel click Purge.
2. In the Purge dialog box, make certain the box next to Materials is checked.
Note: If not purging styles, uncheck the Styles box.
3. In the Compare materials against list, select the material library to compare against, the list updates to show the materials in the document.
4. In the list section, set the "Purge?" value to "Yes" for materials you want removed from the document.
5. Click OK. All list items designated "Yes" for purging are removed.