Logging edits to a record

Thanks, Dan! That is helpful and much more thorough then the instructional I found. I do have a couple of questions. When it says to create a user defined variable where do I do this at? Also, I see where I can add a page. It gives me three options...1. Home Page, 2. Rich Text Page, 3. HTML/Code Page. Is this the right way to create a user defined page or is that something entirely different? I have tried searching for more info on this but did not find an answer. I appreciate your help and apologize if this information already exists somewhere and I'm not seeing it.