Examples of text customized

black text on white backtround. added space before headings. increased line-spacing
brown text on tan backtground. large main text in serif font. small headings in different fonts, colors, and borders.
black background. main text: yellow and sans serif font. heading text: large, lavender, serif font, and indented

Text Customization for Readability


Millions of people cannot read normally-formatted text, and millions more will not be able to in the coming years as their vision declines due to ageing. Many people with low vision, dyslexia, and related conditions and situations that impact reading cannot read the text in print books, newspapers, manuals, etc. (even with reading glasses). However they can read text that is formatted differently, for example, with larger letters, different font, more spacing, etc.

Electronic media (websites, PDF files, e-books) offers the opportunity for unprecedented access to information for people with print disabilities because accessibility barriers of print can be overcome through technology. With technology such as word processing software, electronic text can be customized (with larger font, etc.) to be readable by more people with visual perceptual impairments.

However, some mainstream technologies and tools do not provide sufficient text customization functionality to make text readable.

PDF files are of particular concern because:

Part of the issue is that some accessibility guidelines and standards do not sufficiently address text customization requirements in order for people to be able to read electronic text.

Please learn more about:

Research and references are throughout this TAdER website.

You can help!


If you...

The TAdER Project

Learn about the TAdER Project.


There needs to be universal design of these settings for all computers around the globe, so that all computers—regardless of where you are—are accessible to people who are visually impaired, dyslexic, older, have neurological issues, etc.
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Note: Not W3C WAI

Please be careful in referencing the information on this tader.info website and e-mails from uiAccess.com as from the individual Shawn, not W3C or WAI. Although Shawn also works part-time for the W3C WAI, these are not W3C WAI publications.

Some information on this website may be included in WAI material published on the W3C website — that you can reference as WAI info.

For more information

Shawn Henry

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Date: Updated 8 January 2016. First posted 2012.