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Re: WCAG 2.0 SC 1.4.4 - Text Zoom Vs Browser Zoom

for

From: Detlev Fischer
Date: Sep 16, 2014 12:05PM

Just to clarify, I was only answering Rakesh's initial question ("Is the global zoom a sufficient way to execute and test S.C 1.4.4?") by rendering what I believe is still the current WCAG working group position. And the answer is: Yes, it is. But clearly, if it is possible to support text resizing as well that would be better (it might be hard to implement in the scenario Rakesh has described, though).

I agree with Denis and Jared that it is good to support text resizing wherever possible - I have seen that in many LV user tests now and have argued in favour of making text-only resizing a WCAG requirement (but only up to 150% - a position which is in synch with what Jared suggested in "WCAG next"). The WCAG WG thought otherwise, and responsive web design and the growth of the mobile web have changed the situation anyway (as Alastair has pointed out).

I have tried to render the entire argument about text and zoom resizing in an article a while ago:

"Text resizing: Why page zoom is not good enough - or is it?" http://www.bitvtest.eu/articles/article/lesen/zoom-and-text-resizing.html

Just for those who would enjoy a recap...

Best,
Detlev

On 16 Sep 2014, at 18:25, "Stanzel, Susan - FSA, Kansas City, MO" < <EMAIL REMOVED> > wrote:

> Then for testing wouldn't we have to do both types of testing? I use JAWS, but we always have to give meaning to the images if it is more than decoration. It seems to me if the person can't enlarge the image something will be missed.
>
> Susie
>
> -----Original Message-----
> From: <EMAIL REMOVED> [mailto: <EMAIL REMOVED> ] On Behalf Of Lewis Phillips
> Sent: Tuesday, September 16, 2014 10:57 AM
> To: WebAIM Discussion List
> Subject: Re: [WebAIM] WCAG 2.0 SC 1.4.4 - Text Zoom Vs Browser Zoom
>
> Susie,
>
> Text zoom only increases the text size and doesn't change the image size.
> If there is an important information in the image (text, chart) this is not enlarged with text zoom.
>
> On Tue, Sep 16, 2014 at 10:43 AM, Stanzel, Susan - FSA, Kansas City, MO < <EMAIL REMOVED> > wrote:
>
>> What does text zoom do to the images on the page which could be important?
>>
>> Susie Stanzel
>>
>> -----Original Message-----
>> From: <EMAIL REMOVED> [mailto:
>> <EMAIL REMOVED> ] On Behalf Of Karl Groves
>> Sent: Tuesday, September 16, 2014 10:06 AM
>> To: WebAIM Discussion List
>> Subject: Re: [WebAIM] WCAG 2.0 SC 1.4.4 - Text Zoom Vs Browser Zoom
>>
>> Rakesh,
>>
>> You might want to take a look at prior conversations on this list and
>> the WAI-IG list, as I recall two pretty informative discussions on this topic.
>>
>> Also, this comprehensive post by Denis Boudreau
>> http://www.denisboudreau.org/blog/2013/07/why-browser-zoom-testing-suc
>> ks-for-accessibility/
>>
>>
>> On Tue, Sep 16, 2014 at 4:24 AM, Rakesh P < <EMAIL REMOVED> > wrote:
>>> Dear All,
>>>
>>> We have a web application where content on the site is getting
>>> restructured if we use global zoom to magnify the content.
>>> In one of the page, there is a chart image with image hot spots
>>> (functional links) as indicator of some chart value. When we do
>>> global zoom, the entire chart (with image hot shots) is getting
>>> re-sized and no distortion is happening. But with Text Zoom (using
>>> Text Zoom option in Firefox browser), only the text is re-sizing and
>>> not the chart image, so the position of image hot spots are getting
>>> distorted and this will definitely create some difficulty for user
>>> using text zoom (low vision user).
>>> As per WCAG SC 1.4.4 (Text Re-size), the content of the page should
>>> not be clipped, truncated or obscured with 200% Text Zoom.
>>> We want to understand, in a scenario like this, where Global Zoom is
>>> handled efficiently and doesn't cause any loss of information or
>>> horizontal scroll, is it really required to handle distortion caused
>>> by browser text zoom? Is the global zoom a sufficient way to execute
>>> and test S.C 1.4.4?
>>>
>>> Thanks & Regards
>>> Rakesh Paladugula
>>> >>> >>> list messages to <EMAIL REMOVED>
>>
>>
>>
>> --
>>
>> Karl Groves
>> www.karlgroves.com
>> @karlgroves
>> http://www.linkedin.com/in/karlgroves
>> Phone: +1 410.541.6829
>>
>> Modern Web Toolsets and Accessibility
>> https://www.youtube.com/watch?v=_uq6Db47-Ks
>>
>> www.tenon.io
>> >> >> list messages to <EMAIL REMOVED>
>>
>>
>>
>>
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> > > > > --
Detlev Fischer
testkreis - das Accessibility-Team von feld.wald.wiese
c/o feld.wald.wiese
Thedestraße 2
22767 Hamburg

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