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Re: Making pt a non-physical unit

From: Henri Sivonen <hsivonen@iki.fi>
Date: Fri, 8 Jan 2010 09:29:09 +0200
Cc: www-style List <www-style@w3.org>
Message-Id: <07B2ED26-5D31-4554-B3EE-F6B024653FF2@iki.fi>
To: Jonathan Kew <jonathan@jfkew.plus.com>, David Singer <singer@apple.com>
On Jan 7, 2010, at 16:53, Jonathan Kew wrote:

> My own (perhaps rather vague) thinking is that "true" dimensions would still zoom - along with everything else - in scenarios where the overall display is being zoomed, like when you use pinch gestures on an iPhone, or the accessibility features on Mac OS X. But they would not be affected by "text zoom" features that change the root em unit, and they would resolve to correct physical distances at the default ("100% zoom") display size.

It seems to me that if Web authors were able to size text in "true" dimensions and true dimensions didn't zoom under text zoom, the old IE6 problem of text zoom not working (as perceived by the user) would be reintroduced.

On Jan 7, 2010, at 20:43, David Singer wrote:

> We can deem that computer displays are also at normal viewing distance, I suspect.

We can't in the general case. My home computer is a Mac Mini whose display (what legacy-oriented marketers call a "TV") is about 3.5 meters away. 

(I'd love to be able to use the OS X UI zoom factor, but I can't because all the apps break. Instead, I run with near-illegible native UI and rely on the Firefox content zoom heavily.)

Henri Sivonen
Received on Friday, 8 January 2010 07:29:49 UTC

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