To search for a person in your Address Book, click Search on the button bar within Address Book.

Enter the search text and, from the drop down box, select whether to search by initials, first name, last name, email address, or all. Click the Search button.

A list of entries whose information contains the search phrase will be shown. To go to it, click the entry you would like to view.

The user's name will be highlighted in yellow in the Users List screen.