RE: WCAG 1.4.4 and resolution/DPI

In my experience resolution does matter.  For example at a starting resolution over 2200 I can zoom in to 200% and never hit a responsive break point.  With a resolution of 1280x768 I can start and hit 2 breakpoints.   In one of the breakpoints some functionality is not available.  In other cases for non-responsive sites that are quasi fluid the resolution very much can affect when the issues occur or don't occur.    I think your assumption is that non-responsive sites will just zoom and responsive sites will work automatically because they will want them to appear correctly for mobile.  But again I find pages where this is not the case that have shared before with snap-to-scrolling, fixed headers, etc.

I would suggest starting with 1280x768 or 1280x960 or similar resolution.

Jonathan

Jonathan Avila, CPWA
Chief Accessibility Officer
Level Access
jon.avila@levelaccess.com
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From: Alastair Campbell <acampbell@nomensa.com>
Sent: Wednesday, September 5, 2018 5:00 PM
To: Jason Grieves <Jason.Grieves@microsoft.com>
Cc: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Subject: RE: WCAG 1.4.4 and resolution/DPI

Hi Jason,

The resolution should not impact testing, it is whether it can be made 200% bigger from its starting point.

Is there a scenario you have discovered where resolution makes testing difficult?

Kind regards,

-Alastair

From: Jason Grieves

Greetings,

Are there recommendations at which resolution/DPI should be tested to meet the 200% resizing requirement?

https://www.w3.org/WAI/WCAG21/Understanding/resize-text

Thanks,

Jason Grieves