Use the address book to store your friends, contacts or important addresses. You can reference back to addresses in the future, and composeemail messages with selected emails from the address-book. 

Click 'New Contact' to create a new entry in the address book. Enter the users details, and select submit to write the entry to the address book. You can modify/delete entry's in the address book by selecting the icons on the right. 

You can group your contacts - on the left-hand side of the address book screen, you can add and remove groups of contacts, and drag-and-drop contacts into groups.