Reading Usable Help
@UsableHelp on Twitter
Gordon R. Meyer
Better fonts for Apple Help
Noted hypertext expert Mark Bernstein observes that the inclusion of high-quality typefaces in Mac OS X has opened a new door for website designers. Since the native help system on Mac OS X is HTML-based, this opportunity extends to help designers, too.
If you're authoring for Mac OS X, consider specifying Lucida Grande as your primary sans typeface. (This is what Apple's own products use, but if you're fond of another OS X font, try using that instead.( If you're authoring for multiple environments (Windows, the web, etc) then specify Lucida Grande as the first typeface, then include Helvetica (or whatever standard font you prefer) as the fallback. This allows the same files to be used everywhere.