>Heeding the wisdom of Max (Apr. 9), I'm adding more heading tags to >my pages. This immediately runs into a design problem: Headings 2 >and 3 are often too big to be used without mucking up the page.
See http://www.mcsr.olemiss.edu/%7Emudws/font.html for a rant on the subject of why forcing font size is a bad idea. "The truly insidious effects of the FONT element are reserved for users of popular graphic browsers like Netscape and Internet Explorer."
http://www.htmlhelp.com/reference/css/ has a basic tutorial. What's really good about style sheets is that you can change the appearance of an entire site by changing just the style sheets