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Teaching Essentials

Accessible Images

Text alternatives (alt text)

All images require text as an alternative (or alt text)  to the visuals that describes their content or their context in relation to the text content. This applies to images used in LEARN, Word, PowerPoint and PDFs.

  • Provide appropriate, equivalent alternative text (alt text) for all images
  • Provide a description of the image or describe the context of how the image is being used.
  • Limit alt text to a maximum of 140 characters or less


Charts and graphs

Complex images (graphs, charts) and info graphics require alt text and captions or text transcriptions to describe their contents.

Images with embedded text

Avoid using images with text embedded in them. If you must use an image with text in it, alt text and captions to describe the text.

Who benefits from text alternatives?

  • People who have difficulty perceiving visual content. Assistive technology can read text aloud, present it visually, or convert it to Braille.
  • People who are Deaf, are hard of hearing, or who are having trouble understanding audio information can read the text presentation.
  • People who are Deafblind can read the text in Braille.