notdef is the original version of font fallback-a rudimentary solution for a problem that didn’t exist when printing was physical. notdef, and the dot is there to signify it’s unlike any others.notdef is a glyph of last resort, one to be used when a font is asked for a character its designer did not bother to draw. Some fonts cover a smaller amount of all the possible characters, and some cover a bigger amountĪt some point, you have to draw the line. Even a simple western font comes with over two hundred glyphs: twenty-six letters of the alphabet plus the same bunch in uppercase, ten digits, symbols, punctuation, accents.

This space (sometimes) intentionally left (somewhat) blankĪs a type designer, one of your jobs is to give your font every glyph it needs.Ī glyph is a typographical term roughly meaning a character.

That mechanism helps fonts when they run out of characters, and it’s called font fallback. Moreover, all have one common underlying cause-an important and in some ways very impressive mechanism of computer typography many of us might be completely unaware of. They seem like small bugs that permeate everyday interaction with our tasteless machines.īut these are not bugs, at least not in the traditional sense. These little transgressions can be confusing, but not frustrating enough to spend time dissecting. (If you actually raised your hand, thank you!) Something tells me there is no one left with their hand down at this point.

Khmer normal dot s