The Description: are gives a description of the item selected in the Graph: area. If nothing is selected, a description of the window at the root of the graph is shown. The following information is listed:
The object which represents the selected window
The class of the window object.
The name of the selected window.
The CAPI representation of the selected window.
The underlying native window system object which represents the selected window.
The name of the screen on which the selected window is displayed.
Any item selected in the Description list can be operated on by using commands under the Description menu. This menu gives you access to the standard actions commands described in Performing operations on selected objects.
LispWorks IDE User Guide (Unix version) - 25 Nov 2011