Address books are a great time saving feature. Frequently used addresses may be stored here.
5.1 - Nick Name
Put a familiar name here. Something to help jog your memory. Anything that will give you an accurate idea to whom this email address belongs.
5.2 - Email Address
This must be the person's fully qualified email address. Guessing here just won't cut it. There are three parts to an email address. First is the recipients identifier, such as "johnq". Next is the domain name section, which could take the form "tayloru". Last comes the top level domain, which could be one of a ton of things like au, cc, us, com, org, net or might look like edu. So if we put all those together it must be in the form of email@example.com. If this is not correct you are likely to get your mail back in the form of a bounced message.
5.3 - Info
This is another field where you can put something to remind you about who this person is. This is made to be longer than the "Nick Name". For instance, if you meet a business contact, you could put "Met at the Tomatoe Symposium".
5.4 - Edit or Delete
These two buttons allow you to select a single address and then change any of the above fields, or delete the entry entirely. You are only allowed to select one entry at a time for the edit button.
5.5 - Add to Personal address book
Fill in the fields as they are listed. The first three (Nickname, E-mail address, and First name) must be filled in. Both Last name and Additional info are optional.