You now select the Editor font preference option by Preferences... > Environment > Styles > Editor Font .
The Editor Font preference takes effect only if you select Override the system default font . Then an area displaying sample text in the current preference font become active, and you can choose a new font by double-clicking on the sample text.
The Editor Font preference setting now affects all Editor tools and other tools based on
such as the Listener tool.
There are no longer options for applying the setting only to current Editor windows or the current window only, as in LispWorks 5.1.