FEATURE BOXES provide additional, relevant information Some take an historical perspective, some focus on techniques and applications, and others explore a text topic in greater depth BOLDFACED TERMS are defined in the Glossary The ART in the ninth edition has been thoroughly revised but still maintains the use of consistent color codingThe ART in the ninth edition has been thoroughly revised, but still maintains the use of consistent color coding. BOLDFACED TERMS are defined in the Glossary. FEATURE BOXES provide additional, relevant information. Some take an historical perspective, some focus on techniques and applications, and others explore a text topic in greater depth