When you open or edit a contact, you'll use the buttons in the Show group to show or hide more information about a contact. For example, if you want to note the birthday or anniversary of a contact, you would do that by clicking the Details button and selecting the appropriate date next to Birthday or Anniversary.
To edit a contact's Electronic Business Card, click the Edit Business Card button on the Contact tab. You'll get a chance to try this out in the practice that's coming up next.