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Posted by Sherm Pendley on 09/29/07 18:40
"Jukka K. Korpela" <jkorpela@cs.tut.fi> writes:
> In fact, the size
> of millimeter, inch etc. _do_ change if the monitor resolution is
> changed, but this is a different oddity.
Just to clarify that point - obviously, the real-world size of these units
does not change. What changes is the number of pixels per inch your monitor
is displaying. Sadly, many browsers(1) simply assume a 96ppi display, and
fail to adjust for reality.
So, if you specify a 1in margin (for example) in CSS, what you'll usually
get is 96px - which will only result in a 1" margin if your monitor is set
to exactly 96ppi. If your monitor is 72ppi instead, you'll get a 1.25"
margin, and at 120ppi, .75".
sherm--
(1) Mozilla is one exception - its control panel has a pane where you can
hold a ruler up to the screen to calibrate the PPI setting it uses when
translating physical units into pixels.
--
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