Each of the items listed here provides a link to the complete discussion of that topic in Appendix VI.
Avoid making page design choices based on the on-screen presentation of one browser. (The discussion topics include Text vs. Graphical, Macintosh vs. Windows, Screen Size, and Color Availability.)
Be cautious setting the font, changing its size or color, or making it boldface. (The discussion topics include Background Issues, Other Color Issues, and Emphasis Issues.)