To Copy and Customize Primitives

1. Click Manage tab MEP Content panel Content Builder.
2. In the Getting Started - Catalog Screen dialog box, for Part Catalog, select Primitives and Re-usable Parts.
   

   Getting Started - Catalog Screen dialog box for primitives

3. Select the primitive to modify, and click .
4. Modify the primitive as desired, and click .
5. In the Save Part Family As dialog box, select the chapter (folder) in which to save the primitive, enter a new name for the primitive, and click OK.

You can also copy primitives by copying the DWG files and renaming the copies. By default, the DWG and BMP files for primitives are located in the following folder: \ProgramData\Autodesk\MEP <version>\enu\Shared\Primitives.