Click the Code tab to switch to the code view. You can use this view to display and edit the code that is generated by the Interface Builder. The Interface Builder appears as shown in Displaying source code in the Interface Builder.
Figure 19.6 Displaying source code in the Interface Builder
Like the other views in the Interface Builder, an Interface: box at the top of the code view displays the name of the current interface. See Interface box for details.
The rest of this view is dedicated to an editor window that displays the code generated for the interface. Like other editor windows in the LispWorks IDE, all the keyboard commands available in the built-in editor are available in the Code area.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011