The option
Use Find Definitions list for more items than:
affects the behavior of source location commands such as the editor commands
Find Source
and
Find Source for Dspec
, and the menu command
Expression > Find Source
. When the number of source location results exceeds the value of this option, then the results are immediately displayed in the Find Definitions view of an Editor tool. This is particularly useful when you need to locate the definition of a particular CLOS method from the generic function name.
The Find Definitions view is described in Finding definitions.
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011