How do I add extra fields to registration form

I require extra fields in the registration form for membership, for example, Address, City, State, etc.

How do I achieve this as functionality? It appears to be a fairly basic requirement of any registration process, yet I can't seem to find it in either the setup or mentioned in the manual or KB.

I have activated the Profile Fields add-on, and having read through the KB, I note that I should be able to add extra fields but have been unable to find any way of adding these fields. Thanks in advance for your assistance.

Cheers,
Keith