You can control the behavior and appearance of the debugger using the Preferences dialog.
To do this, raise the Preferences dialog by one of the methods described in Setting preferences and select Debugger in the list on the left side of the dialog.
Figure 11.4 Debugger Preferences
By default, the call frame for each active function call in the backtrace is listed in the Backtrace area. There are a number of other types of call frame which are hidden by default. Display call frames of these types by selecting them in the View Frame panel of the debugger Preferences:
Lists any hidden symbols in the Backtrace list.
Lists all the restart frames in the Backtrace list. Each restart frame is listed, with the restart action to be taken given in brackets. To restart execution at any restart frame, select the frame, and choose Debug > Frame > Restart Frame .
Note that all these commands can be toggled: choosing any command switches the display option on or off, depending on its current state. By default, all the options are off when the debugger is first invoked.
Specify a package name in the text box to change the process package of the debugger tool. You can use completion to reduce typing: click on to which allows you to select from a list of all package names which begin with the partial input you have entered. See Completion for detailed instructions.
LispWorks IDE User Guide (Macintosh version) - 12 Feb 2015