Making a PDF accessible for visually impaired users is an important aspect of design that helps create an inclusive environment for everyone. Here are some steps you can follow to make your PDFs accessible for visually impaired users in InDesign:
- Structure your document
To make your document more accessible for visually impaired users, it's essential to structure it properly. There are different types of structures in documents that include headings, paragraphs, lists, and tables. For example, headings should be consistent and use the appropriate hierarchy.
- Use alt text for images
Alt text or alternative text is a description of an image that is read aloud by screen readers. Alt text should be concise, descriptive, and provide context. To add alt text to an image in InDesign, select the image, right-click and choose 'Object Export Options'. Under the 'Alt Text' tab, add a description of the image.
- Use descriptive links
Links within a document should be descriptive and provide context to the visually impaired user. Instead of using text like 'Click here', include a description of the link. Screen readers can quickly navigate to the link with a clear description.
- Use accessible colors and contrast
Another critical aspect of designing for visually impaired users is the use of accessible colors and contrast. The right combination of foreground and background color can significantly affect the readability of text for visually impaired users. The contrast should be at least 4.5:1 for text that is 14pt or larger or 3:1 for text that is bold or is either 18pt or larger or 14pt, but also including logos.
- Use accessible fonts and styles
Fonts and styles can also affect the readability of a document for visually impaired users. Avoid small fonts or fonts that are difficult to read, like fancy or decorative fonts. Use appropriate font sizes, spacing between lines, and paragraph formatting to improve readability.
- Export the document as a tagged PDF
The final step in making a PDF accessible for visually impaired users is to export the document as a tagged PDF. A tagged PDF includes the necessary structure and metadata for accessibility, including tagging images and links, adding alt text, and defining reading order. To export your document as a tagged PDF, go to File > Export, choose Adobe PDF (Interactive), select 'Tagged PDF' under options, and click Export.
By following these steps, you can ensure that your PDF is accessible and inclusive for visually impaired users. Creating accessible content is crucial in making sure that everyone can access and understand your message, regardless of their physical abilities.