Hi Jack
Chuck's answer is perfect. Just in case a video would help, you can check the following link for some basics about the Eclipse Editor:
Visual COBOL for Eclipse in a Nutshell:Editor Basics
At about 3:35, the video shows a shortcut to get to Editor preferences, and at about 4:20, there is discussion of choosing and customizing the colorization options used in the Visual COBOL for Eclipse editor.