The main search setting is the Regexp: box.
Enter a string or regular expression in the
Regexp:
box and press
Return
or click the 
button. This will match symbol names of interned symbols in a similar way to
apropos
, except that it is a case-insensitive regular expression match.
The remainder of this section describes the other search settings.
LispWorks IDE User Guide (Unix version) - 25 Nov 2011