This document discusses visual design principles for web development. It defines visual design as planning the look of a website, including color schemes, fonts, graphics, and layout. Good visual design uses a visual theme connected to the website content and consistent use of templates, tables, or divs to arrange visual elements. The document recommends using thumbnail sketches and rough sketches in the design process to help visualize webpage designs before development. Prototyping tools can then be used to further refine the visual design.