Quote:
Originally Posted by deback
I'm pretty sure it won't work if you include the "em" when the value is 0. That is, the intended effect for that class will not happen if you include the "em" when the value is 0.
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I just checked and it worked with cm, mm, in, px, pt, pc, em, ex, ch, rem and % in calibre's editor and Sigil's preview. Basically, all the measurement units that I could remember. It seems as if 0 time anything is 0.