2. Images
Describe the purpose or content conveyed by an image using alternative text, imagining what text you’d have used if not using the image.
Structure documents and web pages using built-in headings based on the organizational hierarchy of the document.
Expand the sections below to learn the benefits that come from structuring documents using built-in headings.
Software can present an outline view created from a document's headings thus allowing non-visual users to hear the list of headings and use them to navigate a document just as quickly as sighted users can. Similarly, such lists can minimize the movements users with physical impairments need make to find headings and navigate within a document.
Document editing programs have tools which allow content creators to indicate "real" structural headings (often referred to as "built-in" headings). Assistive technologies (Links to an external site.) recognize these built-in headings and allow users with disabilities to get a list of just the headings and to navigate straight to the heading of their choice.
All readers benefit from having headings that allow skimming through a document to discover the topics covered, learn how it's organized, and to quickly find the desired content.
Descriptive section headings help by making it possible to predict which document sections to read. This aids readers with concussions, dyslexia, short-term memory loss, traumatic brain injury to non-native readers, readers with headaches, or anyone that reads slowly.
Headings are a more robust means of delineating content sections than other means of document formatting. Background colors, borders, horizontal rules, and whitespace may change or be eliminated when responsive designs simplify and reflow content for viewing on small screens.
You can quickly update the style of every heading of a particular heading level (style) in a Microsoft Word and Google Doc document at once both saving time and helping to provide a consistent look and feel. See:
If headings and their subheadings are used correctly, they can be used to automatically generate and maintain a table of contents in Word and Google Docs. See:
Note: When editing a page, assignment instructions, etc. using the Canvas Rich Content Editor (RCE), the headings start at heading level 2 (the title for the page, assignment, quiz, etc. is already a heading level 1).
See: Headings in Canvas: SBCTC's Library of Accessibility Resources
Assistive technologies see the PowerPoint slide titles as headings. Be sure to use the built-in slide templates and ensure every slide has a title. Every slide's content should be simple enough to need only the one "heading" (title)
See: Microsoft PowerPoint: Title a slide Links to an external site.
Describe the purpose or content conveyed by an image using alternative text, imagining what text you’d have used if not using the image.
Individuals with visual impairments use screen-reading software that converts text to speech and reads aloud software interfaces and text content. Unfortunately, artificial intelligence has not progressed to the point where computers can automatically provide meaningful descriptions of images.
Alternative text (alt-text) is the text that screen-reading software reads aloud in place of an image. By providing meaningful alt-text, individuals with visual impairments can have access to the information provided in images.
Programs like Ally Links to an external site. and Texthelp Read&Write Links to an external site. can convert documents and web content into audio formats. These tools increase engagement with course materials by making it possible to have documents read aloud so anyone can listen to content when too tired to it read off a screen, while driving, doing dishes, working out at the gym, etc.
By including meaningful alt-text for images, any individuals choosing to listen to content gets a complete experience.
Choosing or creating the right image can be difficult. The process of writing an image's description can help ensure the image really demonstrates the message you intended for a particular context.
Answer the question: What is the content or function conveyed by the image in this particular context?
Write in simple, precise language, and keep the description concise.
Avoid starting with phrases such as "image of ..." or "graphic of ...“. Assistive technology will announce that it is an image.
A good guideline is to keep alt-text on images to 125 or less characters.
If the image is described elsewhere in the document, indicate that.
Longer descriptions (more than about 125 characters) should be included in the body text of your document or as a long description that is linked to.
Use link text that describes the link’s destination or function. Instead of “click here” or “read more” use “read more about Psychology 101”.
Screen-reading software can collect all of the links on a web page or from a document and present the list to non-visual users so they can hear the list of links and use them to navigate just as quickly as sighted users can.
Similarly, such lists can minimize the movements users with physical impairments need make to find links and use them to navigate.
When link texts are not descriptive, the list of links will not make sense out of context and such tools become useless:
Consider the following text; wouldn't use feel more comfortable with or motivated to click the links if you all these links go?
Consider the following text; if you come back to it in a semester, are you going to remember where all these links go?
You can quickly update the style of every heading of a particular heading level (style) in a Microsoft Word and Google Doc document at once both saving time and helping to provide a consistent look and feel. See:
If headings and their subheadings are used correctly, they can be used to automatically generate and maintain a table of contents in Word and Google Docs. See:
Use text colors that strongly contrast with the background. Don’t use color as the only way to identify something.
Many people have some form of color blindness and people with low-vision need high-contrast for ease of reading.
Mobile devices are often used outside where bright sunlight can wash out a device's display. Higher contrast text and design features will be easier to read in these situations.
Each element contains a different number of protons and neutrons, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains. The mass number is the number of protons plus the number of neutrons of that element. Therefore, it is possible to determine the number of neutrons by subtracting the atomic number from the mass number.
Format numbered or bulleted lists using built-in list formats.
Screen-reading software used by individuals with visual impairments will announce when it encounters a list. It will describe how many items are in the list and provide features for easily navigating to each list item or for skipping the list entirely.
Similarly, tools for users that have physical impairments can help them quickly navigate list items and skip past long lists.
A “wall of text” in a document can discourage reading. Instead, present concepts as lists where possible. Use lists to:
Use the built-in table tool only for formatting tabular data (not for page layout), and include meaningful column and/or row headers to describe the data.
Tables can contain many rows and columns of data. Sighted users can easily perceive the columns and rows and can quickly find the headers associated with each number or data in the table.
However, if data from a large table was simply read aloud from top to bottom, left to right - an individual with visual impairment could easily get confused as to which value is in which column, struggle to remember the order of column headers, have difficulty knowing when a new row is started, etc.
When built-in table formatting tools are used correctly, then screen-reading software provides features that help non-visual users understand tables by listening as well as help them navigate large tables with confidence.
The built-in table tools provide consistent and neat layout making it easier to detect rows and columns visually. They may also have many built in table styling tools that can alternate background colors of columns and/or rows to make it easier to follow a row or column.
Ensure all videos are accurately captioned, and provide transcripts for audio-only files.
AV blurb
Captions provide access to a video's audio content to the deaf and hard of hearing. Captions include the spoken content, non-dialog content like sound effects, and speaker information.
Mobile devices are often used in environments that are noisy or where playing audio out loud is in appropriate.