In Contact Enhanced → Contacts → Edit Contact you have the Fields: First Sort Field, Second Sort Field and Third Sort Field, which allow you to order the contacts in a List view by them. This is very useful if you want to order your contacts in a category list by Last name.
If ordering is set to Name (in the Component options, under the List tab), it will use these fields to sort the Contacts in the Category list. If they are blank it will use the Name field.Useful when you What to sort the list by Last name, but want to display the first name in the Category list view. For example, your Contact Name is John Smith, but you want to sort by last name, then in the "First Sort Field" you ad Smith and in the "Second Sort Field" you add John.