How do I add people to my Addressbook?

From within an e-mail message:

1. Click the Addressbook icon next to an e-mail address to add that address to your Addressbook.

2. You will see a confirmation message that the address has been added.

If you want to add information, such as a nickname or postal address, to the new Addressbook entry, you can edit the entry. Only the available information, such as e-mail address and possibly name, will be added for now.

From the Addressbook:
1. Open your Addressbook by clicking the Addressbook icon in the icon bar at the top of the page.
2. In the Addressbook icon bar, click Add.

3. Enter contact information for your entry. At a minimum, you should enter a name and e-mail address. Then click Save.

The new entry will be added to your Addressbook.

How do I open/edit/delete an Addressbook entry?