>Also, use the Class browser to look at the classes. There you will see the
>inheritence heirarchy visually so it is easy to move up the tree and look at
>parent class code.

In addition to the Class Browser, Ken Levy has writen a wonderful little utility called "SuperClass", which allows you to view/edit the parent code in a child method. Check out his web site at www.classx.com for lots of neat utilities.