The Function Description area gives a description of the function selected in the mainarea, or, if nothing is selected, the current function (as displayed in the Function area). The following items of information are displayed:
The name of the function.
The function object.
The lambda list of the function.
The source file in which the function is defined, if any.
You can operate on any of the items in this area using the commands in the Description menu, which is also available as the context menu. This contains the standard actions described in Performing operations on selected objects.
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011