The way I read it, the 200% relates to 'twice the size the font appears at a
client browser's default setting'.

>What if the
> websites default size is set in
>percentage to 75% and then another website
> has default setting of 110%?

This 200% business is nothing to do with CSS font-size values. (Which depend
on the absolute baseline size of the font on your site, set by either you of
the  browser's default)

It's not measurable or testable. It's just there to highlight the fact that
users need to (and want to) resize the font and that sites should allow them
to do that. 

On 12/12/2008 11:19, "Heather" <heat...@serensites.com> wrote:

> Thanks for reply Patrick, very interesting - looking at that I do agree that
> it would be 6 steps according to the latest Firefox browser.
> 
> I'm not really understanding this point very well and I'm not sure how this
> is measurable and testable across a wide range of platforms? What if the
> websites default size is set in percentage to 75% and then another website
> has default setting of 110%?
> 
> ---> Large scale (text) Note 4: When using text without specifying the font
> size, the smallest font size used on major browsers for unspecified text
> would be a reasonable size to assume for the font. If a level 1 heading is
> rendered in 14pt bold or higher on major browsers, then it would be
> reasonable to assume it is large text. Relative scaling can be calculated
> from the default sizes in a similar fashion.
> 
> Heather
> 
> 
> -----Message d'origine-----
> De : li...@webstandardsgroup.org [mailto:li...@webstandardsgroup.org] De la
> part de Patrick Lauke
> Envoyé : vendredi 12 décembre 2008 11:39
> À : wsg@webstandardsgroup.org
> Objet : RE: [WSG]WCAG 2.0 enlarging text to 200% ?
> 
>> Heather
> 
>> With WCAG 2.0 finally coming out yesterday - I was wondering how many
> ctrl + clicks in (firefox for example) 200% is?
> 
>> I would say it was 3 but some colleagues argue 2 or 4 ? Any
> suggestions?
> 
> I'd say conceptually that's quite a nitpicky argument...say a page broke
> spectacularly after 4 resize steps...would they then argue "but it
> passes WCAG 2.0's SC, because it's 3 steps that go to 200%"? Also, by
> default, Firefox 3 has whole page zoom (text, images and all) enabled,
> and has to explicitly be set to only resize text.
> 
> With that said, go to about:config and look for
> toolkit.zoomManager.zoomValues, and this will show the various zoom
> factors at each step. In my case (which should be the default) these
> are:
> 
> .3, .5, .67, .8, .9, 1, 1.1, 1.2, 1.33, 1.5, 1.7, 2, 2.4, 3
> 
> So, nominally 200% (which, according to the "Understanding..." bit for
> that SC, means "200%, that is, up to twice the width and height" - so
> really a 400% increase in total area) is actually 6 steps, if you want
> to go purely by numbers.
> 
> P
> ________________________________
> Patrick H. Lauke
> Web Editor
> Enterprise & Development
> University of Salford
> Room 113, Faraday House
> Salford, Greater Manchester
> M5 4WT
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