In order to search for a Contact or Group, open your Address Book and type their name or email address in the Search box (as marked below in red) above the corresponding tab (such as Favorites).
The search will show all matching names and emails that are located under that specific tab. To search another list, please click that tab and repeat the search.
To open the Contact or Group, double-click on the selection.
To clear the search, please click the 'x' at the right of the Search Box.