For example, a simple chart might have the following alternative text: "Bar chart of number of traffic fatalities in Ingham county from 2008-2010. A graphic design document describing the introduction and use of different branding marks at MSU might require a more detailed description, if the specific formatting of the text would be important to the reader.įor charts and graphs, chart type (i.e., bar, pie, line, etc.), data type or axes, overall trends or patterns, and relevant data points should be described. The more important an image's content is, the more descriptive the alternative text should be.įor the MSU wordmark (shown in the examples below), "Michigan State University wordmark" would be appropriate for most documents. While there are no hard and fast rules for determining what alternative text should say (it depends on the image, its context, the intent of the author, etc.), one simple trick is to imagine describing the image to someone over the phone. If the body of the document already contains a sufficiently detailed description in close proximity to the image, the alternative text can simply identify the image so that the reader knows when it is being referred to. Images used for purely decorative purposes (i.e., those that do not provide any meaningful information) should not have alternative text. Alternative text should provide sufficient information so that users who are unable to see them are still able to understand what they convey.
This descriptive text should be limited to 120 characters for simple images, while the alternative text for graphs, tables, and complex images (such as detailed maps and diagrams) should give a brief summary of the included information. In this tutorial, the accessibility features of Microsoft PowerPoint will be covered through:Īlternative text for images, charts, graphs, and tables is vital to ensuring that users with visual impairments have access to information included in these visuals.
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A tutorial to Windows versions of PowerPoint is also available.
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This tutorial will walk Mac PowerPoint users using Powerpoint 2004 or 2008 through the implementation of these features to create an accessible PowerPoint presentation.
PowerPoint, the Microsoft Office slideshow presentation program, has a number of tools the content creator can use to increase the accessibility of produced content. Microsoft PowerPoint (Mac) Accessibility Tutorial Introduction
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