You can open an inspector at any point on any object. Just send it the message inspect. The type of the object appears as the name of the inspector window. The instance variables (including the self pseudo-variable) appear on the left pane. Clicking on any of these displays the value for that instance variable in the right pane. By using the middle mouse button, you can also open an inspector on any of the instance variables, even if they point to another complex object. You can open up any number of inspectors to explore very complex objects.
