Select the Listener tab of the Stepper tool to display a Listener.
This area offers all the usual Listener and Debugger commands. Moreover, the execution environment is that of the function currently being stepped, and contains the variables of each frame on the stack.
The Stepper listener also offers the following listener commands to control stepping.
Step Through Call
Step To Call
Step To Value
Step To End
See Stepper controls for a full description of these controls.
LispWorks IDE User Guide (Unix version) - 12 Feb 2015