Open a contents (.hhc) file, and then click Contents Properties.
Contents Properties
Defines the general appearance of the table of contents.
Click the Information Types tab, and then click Add.
In the Category name box, type the name for the first category you want (for example, Experience Level).
In the Description box, type a description for the category. Descriptions for categories and information types are important because they are viewed by the user in the wizard that walks them through information type selection.
In the Information type name box, type the name of the information type you want (for example, Advanced).
In the Description box, type a description of the information type. For example, "topics for advanced users."
Click either Inclusive Type or Exclusive Type to assign an information type attribute.
Notes
You may want to make a backup copy of your contents file before you add information types to it.