Provide text alternatives for any non-text content (photo, illustration, chart, graph, table, infographic) so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language.
If image is pure decoration or is used only for visual formatting, then implement it in a way that it can be ignored by assistive technology.
Image descriptions help people who have difficulty perceiving visual content. When a text alternative is given, assistive technology can change the content to another form (eg., read text aloud, present it visually, convert it to braille). Text alternatives can also help some people who have difficulty understanding the meaning of images (e.g., graphic designs, three-dimensional representations, graphs, charts, animations, etc.).
To add an alt text description to an image in Google Docs or Slides,
Right-click the image, or use keyboard shortcut Ctrl+Alt+Y (Windows) or Cmd+Option+Y (Mac)
Enter alt text in the Description field
Leave the Title field blank. Include titles (for data-rich images such as charts) in the Description field.
Be brief -- short phrases are ideal (<125 characters) unless image conveys complex information
Do not begin with "Image of" or "Picture of"
Start with the most important information
Reflect the essential content and purpose of the image
Avoid repeating information that is already included in the surrounding text
If image is a hyperlink and there is no accompanying link text, describe where the link redirects to
For People You Know
Ask the person to provide a brief physical description of themselves in the image so they can choose which details to include (age, race, gender, hair, height, weight, clothing, accessories, etc.)
Use descriptions the person has written for themselves in the past (professional bios, Instagram captions, etc.)
For People You Don’t Know
Describe physical attributes (e.g. perceived gender, race, age and height, weight, disability status) only if this will enhance understanding of the content or challenge stereotypes in a meaningful way
Prioritize role over physical description (e.g. “A doctor helping a patient access health records on an iPad”)
Use general terms like “person”, “people”, or “a diverse group of people” to avoid making assumptions
Based on their complexity, charts and graphs may require very lengthy explanations to be accessible.
Include a title in the alt text (in Google Docs and Slides, include title at the start of the description)
Briefly summarize the most important takeaways in the alt text description and do one of the following:
Provide a longer description within the text of the document (helpful for others since many people have difficulty understanding charts and graphs)
Create a section at the end of the document for long descriptions
Create a separate document with a long description of the image
Avoid inserting tables in Google Docs and Slides. Instead do one of the following:
Insert an image of the table and add alt text that describes the significant data or trends the table displays, including:
Type of data presented in the table (use column and row headings as a guide)
Data limitations (only covers certain years, draws from certain sources, etc.)
Summary of data (range, median, mode) and overall trends
Source of data
Use lists to present data in a different way
Use Microsoft Word to create documents that will have many tables
Provide a short summary of the function or information presented by the infographic.
Write out all text from the infographic in one of the following locations:
somewhere in your presentation (separate slide, speaker notes section)
below the infographic in your document
in a separate document that is linked near the infographic in the Google Doc or Slide
Decorative images are those that do not present important content or serve as a hyperlink, such as styling or layout elements (ex., borders, dividers) and images added to make a document more visually appealing.
Most word-processing and website platforms allow you to label images as “decorative” or “artifact”, which means the image will be skipped over by screen readers (How to mark images as decorative in Word)
Google Docs/Slides does not yet allow this, so avoid using decorative images (slide backgrounds are fine). If necessary, include an alt text so people know they aren’t missing important content.