On the constituent's profile page, the Family field is used to identify the family the constituent is a member of. You can also link constituents together in family relationships via the Relationships tab. The benefit of the family field is that you can find the data on the Constituents grid.
To add a constituent to a family, click on the arrow on the right side of the field to reveal the list. If you need to create a new family, click on Add/Edit.
You can search for specific or all families using the Family field on the Constituent grid.