To create and edit Families, click on a name in the people tab to access that individual's profile.
There is a section on the right that lists Family Members. Click the Edit link and you're taken to a screen where you can begin adding people to Person's family.
On The Family screen, click the Add Existing Person button and a dialog will pop up where you can type the name of a person already in your database that you wish to be grouped into the Anderson family. This list is actually filtered with the last name of the person's family you're editing.
Tip: You can even upload a family picture.
Alternatively, you can click the Add New Person button on the family view and it will create a new person record in your database and group them into that existing family.
Allow Members to Edit Their Own Family:
If you'd like to allow your members to edit their own family there is a feature setting that can be configured.
Go to the Admin Console, click on the Settings tab and then click on the Features link on the right. Then check the Allow everyone to add and edit family members.
Warning: Please be aware that when you give members the ability to edit their own family you then give them the ability to add new person records to your database.