Clarification Needed on Forgot Password and Registration Workflows

Looking for any documentation on the "forgot password" workflow on the Login/Signup forms. I'm sure I'm just missing it somewhere... but when someone hits "Forgot Password"... Along the same vein, what about the Login (No Account: Signup) and Signup (Account: Login) workflow options? They just seem to be hyperlinks, but if I wanted it to act as a dynamic form for either... is it possible?