On Thursday 2007-05-17 14:18 -0400, Sam Carter wrote: > Wouldn't it make more sense to simply enable or disable font-size-adjust? > > What am I missing?
I tried to explain this a bit better in http://developer.mozilla.org/en/docs/CSS:font-size-adjust The basic idea is that when you specify font-size-adjust, you're choosing to specify the size of the font by the height of its lowercase letters rather than by the font size [1]. But to do it in a backwards-compatible way, you specify a number to multiply the font-size by. So saying: font-size: 20px; font-size-adjust: 0.58; means "I want the font's size to be whatever makes the lowercase letters 20px * 0.58 == 11.6px tall". In browsers that don't support font-size-adjust, this will then degrade gracefully to using the font size of 20px. Specifying the font size by the height of the lowercase letters means that when you switch fonts, it's the height of the lowercase letters that stays consistent, which is often desirable (such as when switching into a monospace font for a few words). (The other thing you're missing is that simply having enable/disable wouldn't work when the first choice font was missing, and it wouldn't work when the font-size-adjust value was inherited to an element with a different list of fonts.) Also, for what it's worth, Gecko 1.9 (Firefox 3) will support font-size-adjust on all platforms (rather than just Windows). -David [1] Please don't ask what the definition of a font size is. -- L. David Baron <URL: http://dbaron.org/ > Technical Lead, Layout & CSS, Mozilla Corporation
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