Alternative text (alt text) allows screen readers to capture the description and read it aloud, providing aid for those with visual impairments. Here’s how to add alt text to an object in PowerPoint.
Adding Alt Text to Objects in PowerPoint
As sophisticated as screen readers are, they still aren’t sophisticated enough to comprehend what an object is or what an image represents without the help of alt text.
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To add alt text in PowerPoint, open your presentation and select the object to which you want to add alt text.
In the “Format” tab, select “Alt Text” in the “Accessibility” group.
Alternatively, you can right-click the object itself and select “Edit Alt Text” from the drop-down menu.
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Source : How to Add Alternative Text to an Object in PowerPoint
