Part User PropertiesKeyCreator \ Assemblies \ Properties \ Part-User-Properties
Part User Properties
The Part User Properties page in the Creating a New Part Reference dialog box allows you to keep user properties and edit them by clicking in the edit field for either the Name or the Value. These are additional user-defined fields that will help you better define the part and its attributes. For complete descriptions of these settings, see File. Any property that is not modified will be inherited from the referenced part, and note stored with the part reference.