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Thread: PDF resize
Number of posts in this thread: 7 (In chronological order)
From:
Date: Tue, Nov 17 2020 10:32PM
Subject: PDF resize
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Hi all,
Would you please give me a hint about the following?
I have a PDF on the website with size of A4 and I am not able toenlarge
to 200 % on my mobile. WCAG 1.4.4 says that text can be resized without
assistive technology up to 200 percent without loss of content or
functionality.
How can a pdf document can conform with WCAG 1.4.4. (and 1.4.10, 1.4.12
etc) ?
Regards,
Zsolt Edelényi
From: Jonathan Avila
Date: Wed, Nov 18 2020 8:51AM
Subject: Re: PDF resize
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Hi, would expect that SC 1.4.4 resize text would be met by PDF viewers if you could use the zoom feature in the viewer to increase text size up to 200% of the default -- even with scrolling in two directions.
For SC 1.4.10 I would imagine the reflow feature of the PDF specification would be used. This feature can be seen in Adobe Acrobat and in VIP Reader although it is not viewer specific feature.
Jonathan
-----Original Message-----
From: WebAIM-Forum < = EMAIL ADDRESS REMOVED = > On Behalf Of Edelényi Zsolt
Sent: Wednesday, November 18, 2020 12:32 AM
To: WebAIM Discussion List < = EMAIL ADDRESS REMOVED = >
Subject: [WebAIM] PDF resize
CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
Hi all,
Would you please give me a hint about the following?
I have a PDF on the website with size of A4 and I am not able toenlarge to 200 % on my mobile. WCAG 1.4.4 says that text can be resized without assistive technology up to 200 percent without loss of content or functionality.
How can a pdf document can conform with WCAG 1.4.4. (and 1.4.10, 1.4.12
etc) ?
Regards,
Zsolt Edelényi
From: Jerra Strong
Date: Wed, Nov 18 2020 9:47AM
Subject: Re: PDF resize
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Hi,
If you look at the "failures" for 1.4.4, basically if enlarging text causes
things to become unreadable by pushing them out of view or making things
overlap, that's a problem. On the WCAG-to-ICT Advice for 1.4.4
<https://www.w3.org/TR/wcag2ict/#visual-audio-contrast-scale> they say that
if your viewer software enlarges to 200% easily, then that's the work done
for you. They also advise against using images of text where possible, in
case they degrade when zooming.
As far as 1.4.10, for PDFs, I would try to reflow the document in Acrobat
<https://helpx.adobe.com/acrobat/using/reading-pdfs-reflow-accessibility-features.html#reflow_a_pdf>
and see what happens with your document.
The Success Criterion 1.4.12
<https://www.w3.org/WAI/WCAG21/Understanding/text-spacing.html> currently
doesn't apply to PDF, according to WCAG, because PDFs can't be adjusted
like that.
On Wed, Nov 18, 2020 at 7:51 AM Jonathan Avila < = EMAIL ADDRESS REMOVED = >
wrote:
> Hi, would expect that SC 1.4.4 resize text would be met by PDF viewers if
> you could use the zoom feature in the viewer to increase text size up to
> 200% of the default -- even with scrolling in two directions.
>
> For SC 1.4.10 I would imagine the reflow feature of the PDF specification
> would be used. This feature can be seen in Adobe Acrobat and in VIP Reader
> although it is not viewer specific feature.
>
> Jonathan
>
> -----Original Message-----
> From: WebAIM-Forum < = EMAIL ADDRESS REMOVED = > On Behalf Of
> Edelényi Zsolt
> Sent: Wednesday, November 18, 2020 12:32 AM
> To: WebAIM Discussion List < = EMAIL ADDRESS REMOVED = >
> Subject: [WebAIM] PDF resize
>
> CAUTION: This email originated from outside of the organization. Do not
> click links or open attachments unless you recognize the sender and know
> the content is safe.
>
>
> Hi all,
>
> Would you please give me a hint about the following?
>
>
> I have a PDF on the website with size of A4 and I am not able toenlarge to
> 200 % on my mobile. WCAG 1.4.4 says that text can be resized without
> assistive technology up to 200 percent without loss of content or
> functionality.
>
>
> How can a pdf document can conform with WCAG 1.4.4. (and 1.4.10, 1.4.12
> etc) ?
>
>
> Regards,
>
> Zsolt Edelényi
>
> > > at http://webaim.org/discussion/archives
> > > > > >
--
Jerra Strong
Interim Accessible Conformance and Design Specialist
UNLV|Office of Accessibility Resources
Office of the Vice Provost for Academic Programs
= EMAIL ADDRESS REMOVED =
*Pronouns: He/Him/His*
From: Duff Johnson
Date: Wed, Nov 18 2020 10:14AM
Subject: Re: PDF resize
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> Hi, would expect that SC 1.4.4 resize text would be met by PDF viewers if you could use the zoom feature in the viewer to increase text size up to 200% of the default -- even with scrolling in two directions.
>
> For SC 1.4.10 I would imagine the reflow feature of the PDF specification would be used.
Not sure what you are referring to here. PDF can be reflowed in an interoperable manner via Tagged PDF, but thus far few applications leverage Tagged PDF for reflow purposes.
> This feature can be seen in Adobe Acrobat and in VIP Reader although it is not viewer specific feature.
So far as I am aware Adobe Acrobat does not yet have a reflow feature based on Tagged PDF. :-( VIP Reader does use tags to perform its reflow, however. :-)
Duff.
From:
Date: Fri, Nov 20 2020 12:51AM
Subject: Re: PDF resize
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Hi,
Thank you for your contribution so far.
Jonathan:
> you could use the zoom feature in the viewer to increase text size up to 200% of the default -- even with scrolling in two directions.
Jerra:
> If you look at the "failures" for 1.4.4, basically if enlarging text causes
> things to become unreadable by pushing them out of view or making things
> overlap, that's a problem.
Duff:
> Not sure what you are referring to here. PDF can be reflowed in an interoperable manner via Tagged PDF, but thus far few applications leverage Tagged PDF for reflow purposes.
To summarize:**You *can enlarge***PDF but*need**scrolling*. You cannot
reflowed without special technology.
Question: *This**means success or failure of 1.4.4. in case of PDFs? *
I am also wondering, if ePUB is better choice than PDF for accessible
publications. What do you think?
Zsolt
From: Jerra Strong
Date: Fri, Nov 20 2020 5:20PM
Subject: Re: PDF resize
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Zsolt,
For the zoom/enlarge question, PDF software can zoom in to 200% on a PDF,
so technically, you'll be passing the WCAG as written. Scrolling in 2
directions or reading them on the phone is not an ideal experience for
anybody (even me!), but because you can zoom to 200% without overlap or
cropping, and because Acrobat Reader has a "reflow" option: a text-only pdf
(i.e.not a fillable form), is passing those WCAG success criteria (1.4.4
and 1.4.12), because the viewer software can zoom and/or reflow when
needed.
I am not the right person to address the ePub vs. PDF question. In my
opinion, PDFs are more common/familiar to more people and the software to
read them is more common, but ePubs have more accessibility-focused
features available.
On Thu, Nov 19, 2020 at 11:51 PM Edelényi Zsolt < = EMAIL ADDRESS REMOVED = > wrote:
> Hi,
>
> Thank you for your contribution so far.
>
> Jonathan:
> > you could use the zoom feature in the viewer to increase text size up to
> 200% of the default -- even with scrolling in two directions.
>
> Jerra:
> > If you look at the "failures" for 1.4.4, basically if enlarging text
> causes
> > things to become unreadable by pushing them out of view or making things
> > overlap, that's a problem.
>
> Duff:
> > Not sure what you are referring to here. PDF can be reflowed in an
> interoperable manner via Tagged PDF, but thus far few applications leverage
> Tagged PDF for reflow purposes.
>
> To summarize:**You *can enlarge***PDF but*need**scrolling*. You cannot
> reflowed without special technology.
>
> Question: *This**means success or failure of 1.4.4. in case of PDFs? *
>
> I am also wondering, if ePUB is better choice than PDF for accessible
> publications. What do you think?
>
> Zsolt
>
>
>
> > > > >
--
Jerra Strong
Interim Accessible Conformance and Design Specialist
UNLV|Office of Accessibility Resources
Office of the Vice Provost for Academic Programs
= EMAIL ADDRESS REMOVED =
*Pronouns: He/Him/His*
From: L Snider
Date: Sun, Nov 22 2020 9:54AM
Subject: Re: PDF resize
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For your EPUB question, yes overall EPUBs give more choice than PDFs. For
example, you can change the font, font size, etc. EPUBs are basically a
website in an EPUB box, so they are far more versatile. The issue you are
talking about in terms of zoom, as well as using PDFs on mobile, were major
factors against PDF until a couple of months ago when Adobe finally (after
eons) made them a bit better on mobile and zoom.
Use of EPUBs will be more, because one can get a good module for Word, and
produce them in Google Docs, etc. However, in my personal view, EPUBs are
still problematic because of the readers...Almost all the readers are not
accessible in some way (except two), major issue. Microsoft pulled support
for EPUBs through EDGE, and in my view that made things much harder...it
was fairly accessible, and if you owned a Windows machine, you likely had
EDGE. That change in my view was a game changer, in the wrong direction,
for EPUB use. Plus the PR for EPUBs is harder, business has not
traditionally used them for many reasons. I believe we need more uptake by
large business (not just IBM) to get this going more.
Hope that helps!
Cheers
Lisa
On Fri, Nov 20, 2020 at 3:51 AM Edelényi Zsolt < = EMAIL ADDRESS REMOVED = > wrote:
> Hi,
>
> Thank you for your contribution so far.
>
> Jonathan:
> > you could use the zoom feature in the viewer to increase text size up to
> 200% of the default -- even with scrolling in two directions.
>
> Jerra:
> > If you look at the "failures" for 1.4.4, basically if enlarging text
> causes
> > things to become unreadable by pushing them out of view or making things
> > overlap, that's a problem.
>
> Duff:
> > Not sure what you are referring to here. PDF can be reflowed in an
> interoperable manner via Tagged PDF, but thus far few applications leverage
> Tagged PDF for reflow purposes.
>
> To summarize:**You *can enlarge***PDF but*need**scrolling*. You cannot
> reflowed without special technology.
>
> Question: *This**means success or failure of 1.4.4. in case of PDFs? *
>
> I am also wondering, if ePUB is better choice than PDF for accessible
> publications. What do you think?
>
> Zsolt
>
>
>
> > > > >