Southern New Hampshire University

PowerPoint (macOS): Adding Alternative Text

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Alternative Text (Alt Text) is also referred to as an alt description or an alt attribute; alt text is critical for those with disabilities because it describes the function and appearance of a photo or graphic that cannot be seen and is read aloud by screen reading software. Alt text improves the overall user experience.

How to get started: Right-Click on the image.

The options from right-clicking on the location icon.

Select "Edit Alt. Text."

Right click menu opened with "Edit Alt. Text ..." boxed.

Describe all visual objects with an Alternative Text (Alt Text).

  • Enter the information needed to understand the image in the Description text field.  Explain “why” the image relates to the content.  Make sure it conveys the information necessary for people to understand. Limit the characters you use to describe your image (maximum characters 80-100).
  • If the image is there only for decoration and does not play an essential role in the presentation, you can "Mark it as decorative."
Alt. text information with a one in the text box and a two next to "Mark as decorative."

To View and Listen to a Video Tutorial:

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