3-pane Window Toolbar - Contacts tab

The Draft button will create a new empty draft message.
The New button will create a new address book.
The Open button will open the selected address books.
The Delete button will delete the selected address books.
Creates a new address in the current address book shown in the address book pane.
Creates a new group in the current address book shown in the address book pane.
Deletes the addresses or groups selected in the address book pane.
The Search button will display the Address Search window to allow addresses to be searched for in selected address books or directory servers.
The Details button is used to show a dialog containing useful information and options that control the behaviour of any selected address books.