To add a new category to
the contacts window, first choose under which current "parent"
category the new category will appear. The top-most levels
are the All Contacts category and the
Unassigned
category. It allows to create subcategories within these
top-most levels, as well as within lower-level categories, such as Carriers or any other category
previously created.
To create a new category under the All Contacts category, selec the parent category by clicking on it.
After that, click the 
button
located at the top of the Contacts - All Contacts window.
The Add Category window will open.
Assign the new category any new name.
The new
category will appear located
under the parent category that was selected, in this case the
All Contacts category.
Note: The pre-defined categories will appear in Bold in opposed to the personally created categories that will not be bolded.
