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Checkpoint 1.4.4 font resizing and defining 200%


From: Jennison Mark Asuncion
Date: Dec 14, 2010 7:21AM


I have three questions about Checkpoint 1.4.4 Resize text.
"Except for captions and images of text, text can be resized without
assistive technology up to 200 percent without loss of content or
functionality. (Level AA)"

1) Does this mean if a widget is used to change the size of the fonts on
a website, that if the fonts are defined to be 11 px, that they need to
be resizable to 22 px to pass this guideline? Or does it mean that they
grow to 200% on the screen, which, depending on the monitor and screen
resolution, might not equate to 22 px exactly?

2) If relative fonts are used and the default font is 1 em, is the
expectation then that the largest fonts would set the font size to 2 em in
order to pass the 200% threshold?

3) If fixed font sizes are used, and browser zoom functionality is relied
upon, would this guideline still be passed if the browser zooming
functionality does not retain all the same functionality? More
specifically, we've seen that when using zooming in IE 7, clicking on
the link text does not always work and you have to move the mouse to
the left a little because the link text and the clickable area are not
properly aligned. Is this considered a loss of content or
functionality, resulting in this guideline not being passed?