To edit the Conditional or Printing properties of a breakpoint, choose the menu command Works > Expression > Edit Breakpoints and proceed as described in Editing breakpoints.
To visit the source code where a breakpoint was set, choose the menu command Works > Expression > Edit Breakpoints , select a breakpoint and press the Goto Source button. This cancels the dialog and then displays the source containing the breakpoint.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011