> I think Tim's concise explanation helped with that understanding. I didn't send that to the entire list, because the website that got sent out right before I finished it said pretty much the same thing, but if it was that helpful, I'll share it with everyone.
Rules of thumb: "em" is like a variable that means "font-size." if the base font-size is 16px (default) then 2em is 32px, .5em is 8px. The difference is what the percentage is relative to. For font-sizing, the percent is relative to the font-size, so they both do the exact same thing. Font-size:2em is the same as font-size:200%. Use which ever you like. It doesn't matter. For box sizing, em is still the font-size. But percent is relative to the container. If you want the box size to change with the font use ems. (ex. if you have a box that you want to always display 3 lines of text then set it to 3.6em -- the height of a line is generally 1.2em, unless you specifically set it to be otherwise) If you want the box to change size with the screen, use percents (height:50% is 50% of the parent container - sometimes the window, sometimes something else, never the font-size) ---Tim ______________________________________________________________________ css-discuss [cs...@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
