Ten Commandments of Guerrilla Marketing Design, No. 5
Guerrillas design for SELECTIVE EMPHASIS.
Guerrillas know when to whisper, when to road. They use design to help readers separate the important from the merely supportive. Changes in typeface, type size, type style, and color are used to highlight important information rather than decorate an otherwise dull page.
Guerrilla Marketers recognize that "less is more" when it comes to selective emphasis. They use discretion when choosing a different typeface design, changing a type size, or setting type in bold or italics.