You can examine any tool window with the Window > Interface menu.
This menu contains the standard action commands described in Performing operations on selected objects. Thus, choose
Window > Interface > Inspect
to inspect the capi:interface object for the window.
Choose Window > Interface > Browse - Window to browse the structure of the window object. From here you can browse the child windows.
For information about the tools mentioned, see The Class Browser and The Inspector and The Window Browser.
LispWorks IDE User Guide (Macintosh version) - 13 Sep 2017