While griping about the hassles of typesetting math in this Typophile thread, I finally put my finger on what makes so many otherwise good typefaces fall apart in math or technical work: character-level legibility. A good text face works best when its letters work together to make good word shapes, right? When the individual glyphs don't pull the reader outside of the flow of the text with too many quirks or spacing irregularities. The trouble with setting math or other technical material (chemical equations, charts of ID codes, etc.) is that the context for the individual letters is much less familiar than in typical text. If text is comprehended word by word with less need for the letters themselves to be individually distinguished, then math is read letter by letter in such a way that almost any character could be swapped out for another and change the meaning entirely.
Most of my problems setting math over the years have had to do with letters that just aren't unique enough when you pull them outside of normal text and start mixing and matching them with Greek and symbols and numbers and lord knows what else. Especially once superiors and inferiors are used, it becomes absolutely critical to know if a glyph is an "l" or an "I" or a "1" or a vertical bar, for instance. (If you're seeing the right CSS styles for this page, see how nicely Georgia distinguishes those from one another? Check out Arial: l I 1 | )
A good face for this environment needs to strike a balance between the ability of the letters to combine easily for typical reading comprehension, but still hang onto enough unique appearance to hold their own in the free-for-all world of tables and equations.
1) India: Yes, yes, makes sense. I'd never thought about it before because 99 percent of the math I've set was using somebody else's template. So I had no choice but to use Minion and Helvetica Neue. (Sep 10, 2006 12:44 PM)
2) India: And now that I've gone over and read the Typophile thread, nice way to make an intelligent observation on a thread that began quite idiotically. The default word space is too small? And it takes too long to fix it using H&Js? Are you kidding me? Please. I have plenty of nitpicky peeves about typefaces, but I wouldn't dare to theorize about what the "default" or "out of the box" word spacing for a font might be. My default word space in Quark and InDesign is 95 percent, and the designer I've worked the most with sets it even tighter, at 90 percent. But I do always print a sample spread and at least glance at it to make sure my defaults are appropriate for the type in question, as well as keeping an eye out for lousy kern pairs, of which there are always a few. It's, um, part of the job of designing, as opposed to merely typing. What a lazy git. (Thanks for providing a quiet space in which to flame.) (Sep 10, 2006 1:10 PM)
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