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Re: Question about px: Relative size?

From: Ben Caldwell <caldwell@trace.wisc.edu>
Date: Thu, 21 Apr 2005 16:48:05 -0500
Message-ID: <42681F95.5010606@trace.wisc.edu>
To: David Woolley <david@djwhome.demon.co.uk>
CC: w3c-wai-ig@w3.org

David Woolley wrote:
>>browsers text size feature.  The pixels units do not allow that. So is =
>>px "relative"?
> 
> 
> For accessibility purposes, pixels should be considered non-scalable,
> and should not be used.

I think it's helfpul to distinguish between today's user agents and 
future user agents. Today, many browsers do not have problems scaling 
px, but because issues remain in mainsteam implementations, we should 
avoid the use of px until the situation changes.

UAAG 1.0 checkpoint 4.1 Configure text scale (P1) [1] does not 
distinguish between absolute and relative sizes and we should be hopeful 
that the need to avoid units like px will diminish over time.

[1] 
<http://www.w3.org/TR/WAI-USERAGENT/guidelines.html#tech-configure-text-scale>

--
Ben Caldwell | <caldwell@trace.wisc.edu>
Trace Research and Development Center <http://trace.wisc.edu>
Received on Thursday, 21 April 2005 21:49:27 GMT

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