Text can be resized to 200% without loss of content or function.
Introduction
Some users with visual impairments need to resize text to understand it fully.
To help these users, your website should allow for up to a 200% resize of text without dropping any content or functions. This should be accomplished in a browser and therefore not require any assistive technology.
How to Pass
Users can resize text content in their web browser up to 200% without loss of meaning or function.
Exceptions
- Images of text (but don’t use images of text because they don’t resize well)
- Captions
Tips
As all modern browsers allow for resizing text, a website based on good HTML and CSS should comply.
If your website doesn’t resize correctly to at least 200% in a browser, add a feature that enables users to resize text (by CSS) based on three or four predetermined options, including 200%.
Check your website by resizing to 200% in a variety of browsers.
Make sure your resized text doesn’t require the user to scroll horizontally and you fulfil part of 1.4.8 – Visual Presentation for Level AAA.
See Also
- Guideline 1.4.5 – Images of Text
- Guideline 1.4.8 – Visual Presentation
- Guideline 1.4.9 – Images of Text (No Exception)
- Understanding Success Criterion 1.4.4 (W3C)
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There are three main potential issues to avoid when doing this:
1) Resized text overlapping other text making it difficult to read
2) Resized text being partly or completely obscured by borders/boxes that don’t expand with the text
3) Resized text straying outside its intended area – the resulting combination of text/background colour may not have sufficient contrast.
Great tips, thanks Richard!