You can delete unused families or unused family types from your projects and templates using either of 2 methods: you can select and delete the families and types in the Project Browser, or you can run the Purge Unused tool.
Select and delete families and types when you have only a few families or types that you need to delete. Use the Purge Unused tool when you need to ''clean up'' your projects. Removing all of the unused families and types usually decreases the project file size.
Whichever method you use, you cannot delete the following:
To select and delete families and types in the Project Browser
The family or type is deleted from the project or template.
If you are deleting a family or type from a project, and the project contains one or more instances of a family type, a warning displays.
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