Quote:
Originally Posted by JSWolf
That's really poor eBook making to use pt instead of em. 20pt is about 1.6em. Using 1.6em is what works and is proper coding. You cannot know what type of screen/program/system the eBook will be read with so using em will handle this.
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Very incorrect statements.
pt, like in, is a physical distance measurement. It is absolutely possible to know what DPI a screen in, and for the reader to calculate the correct number of pixels to represent the correct distance. Not only is it possible, but the adobe Epub reader does it just fine.
Since pt is a actual distance which is not related to font size, it has no similarity to any value in em.