Use the following procedure to add alt text to shapes, including shapes within a SmartArt graphic.
- Right-click a shape.
- Select Format Shape.
- In the right pane, select Size & Properties, and then select Alt Text.
- Type a description and a title.
TIP: Include the most important information in the first line, and be as concise as possible.
For more hints and guidelines for writing good alt text, visit the page Writing for Accessibility: Alt Tags and Long Descriptions.