26.4 A description of the System Browser
The System Browser has four views:
The graph view displays a graph of all the systems defined in the image, together with their members.
The text view lists the systems defined in the image together with the members of the current system.
The preview view provides a powerful way of generating and executing systems plans.
The output view is used to display any output messages which have been created by the System Browser as a result of executing plans.
Common LispWorks User Guide (Unix version) - 5 Jul 2006