The Inspector is a tool for examining objects in your Lisp image. You can also use the Inspector to modify the contents of objects, where this is possible.
You can create an Inspector, choose
Window > Tools > Inspector
or click 
in the LispWorks toolbar.
It is sometimes more natural to invoke an Inspector on some object you are analysing. You can do this using the Inspect menu command. In the Listener, evaluate:
(capi:contain (make-instance 'capi:list-panel :items '(1 2 3 4)))
Then choose Values > Inspect from the Listener's menu bar to see the Inspector tool window illustrated in Inspector.
