The Tools | Project Options | Categories tab as below:
This tab allows users to define Requirement Categories.
•Category
Name of Requirement Category.
•EA Element Type
EA Element Type for referring Requirement Category by EA.
•Icon
Icon of Requirement Category.
•Description
Description of Requirement Category.
•Prefix
Prefix of Requirement Category
•Auto ID Counter
ID number when numbering by Requirement Category in Project Options | Status and Initial Values Tab.
•Up/Down button
Buttons to move the Requirement Category up or down in the list.
•New, Save, Delete buttons
Buttons to create/save/delete Requirement Category.
The number of Requirement Category is settable without limit, but they are viewed up to 15 at Menu of New Requirement.