Pages wider than the browsers window. Some people run other processes in addition to the browser. Frequently, I test my site's pages with a 25MHz 80486DX ISA computer. My messages are best communicated primarily with words. Words can be read and they can be repeated.
Words mean things.
Words can be thought about and mused over. Therefore, I use a helper. My helper, a WordPerfect 5.1 to HTML converter , seems to be biased to Netscape's extensions. Since I have used that for a while, new versions of internet explorer probably adopted similar capability. Text color black reads best on a neutral, default background.