You use the Author site preference to set the class that appears at the root of the class selection tree. Setting a default class provides the following benefits:
NOTE This site preference only affects class selection when adding a document using the Add Document action. You must set the Authoring page display site preference to Workplace XT and Workplace for this setting to have an effect.
To set a starting class
To remove a starting class
Click Restore next to the site preference to set the class back to the default setting.