Quote:
Originally Posted by patrik
As far as I can tell, typical line spacing is 1.2em.
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Line spacing should normally specified without any units. That way, it's applied to the current font size ( 1.2 x 1em, 1.2 x2em, etc.). This helps to avoid line spacing that is less that the font size. One horrible example is where the title elements are set in 2.5em with an inherited 1.2em line spacing.
As for the fractional font sizes, I've see that a lot and never saw a good reason for it. One author my wife reads loves using about 20mm left and right margins -- just like in the good old days when deadtree books were the only game in town.