RE: Interaction of "zoom content" and vertical writing modes

  *   Content can be zoomed to an equivalent width of 320 CSS pixels without loss of content or functionality, and without requiring both horizontal and vertical scrolling.

This has come up many times and the answer is no.  This wording allows for a horizontally scrolling page that doesn’t have vertical scrolling. For horizonal languages like English this would still allow for scrolling in the direction of the text.

Jonathan

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From: Michael Gower [mailto:michael.gower@ca.ibm.com]
Sent: Thursday, November 23, 2017 9:50 AM
To: David MacDonald <david100@sympatico.ca>
Cc: Alastair Campbell <acampbell@nomensa.com>; White, Jason J <jjwhite@ets.org>; WCAG <w3c-wai-gl@w3.org>
Subject: Re: Interaction of "zoom content" and vertical writing modes

Can we cover it this way?

Content can be zoomed to an equivalent width of 320 CSS pixels without loss of content or functionality, and without requiring both horizontal and vertical scrolling.

Michael Gower
IBM Accessibility
Research

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From:        David MacDonald <david100@sympatico.ca<mailto:david100@sympatico.ca>>
To:        Alastair Campbell <acampbell@nomensa.com<mailto:acampbell@nomensa.com>>
Cc:        "White, Jason J" <jjwhite@ets.org<mailto:jjwhite@ets.org>>, WCAG <w3c-wai-gl@w3.org<mailto:w3c-wai-gl@w3.org>>
Date:        2017-11-22 04:55 PM
Subject:        Re: Interaction of "zoom content" and vertical writing modes
________________________________



I'd rather not add the vertical part... it's speculative, and comes at a high cognitive load cost, unless someone brilliantly word smith's it.

Cheers,
David MacDonald

CanAdapt Solutions Inc.
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On Wed, Nov 22, 2017 at 3:46 PM, Alastair Campbell <acampbell@nomensa.com<mailto:acampbell@nomensa.com>> wrote:
[Jason] Yes – they’re going to exist within the lifetime of WCAG 2.1, according to your own investigation, and should thus be handled in the SC.



AC: Well, I said it was possible but the browser support is not there yet, and we don’t know when that might work.

Where there is vertical text at the moment, it is on pages with vertical scrolling.



Given that, I’d rather not complicate it. Just trying makes my head hurt, you end up with something like this:





For pages that scroll vertically by default, content can be zoomed to an equivalent width of 320 CSS pixels without loss of content or functionality, and without requiring horizontal scrolling.



For pages that scroll horizontally by default, content can be zoomed to an equivalent height of 320 CSS pixels without loss of content or functionality, and without requiring vertical scrolling.



Except for parts of the content which require two-dimensional layout for usage or meaning.





-Alastair