When creating a new web part category or editing an existing one, you can specify the following properties:

 

•Category display name: Name of the category displayed in the user interface.

•Category name: Name of the category used in website code.

•Category image path: Path to an image which will be used as the icon for the category in the Select web part dialog in CMS Desk -> Content -> Design.

 

More resources can be found at:

 

•Developer's Guide -> Development -> Web parts -> Overview

•Developer's Guide -> Development -> Web parts -> Developing web parts