Use File Naming Options dialog box to set the file name scheme for all families with a Category.
The file name scheme can be created or edited only for a Read/Write enabled categories and families. To make a category Read/Write enabled, right-click the category, choose Copy To, and select a Read/Write enabled library from the list.
Content Center panel
Editor to display the Content Center Editor dialog box. Select a read/write library in the Library View list. Then right-click a Category and select Family Naming. As prefix adds the expression as a prefix of the file name.
As suffix adds the expression as a suffix of the file name.