Alternative Text in Presentations
To add alternative text to images, right-click on the image, and select Edit Alt Text.
This will open another panel on the right side to add alt text to explain the image. It may be helpful when writing alternative text to close your eyes and write down what you were able to see. One tip, do not include the word “photo of….” as this is not necessary for screen readers to help understand the content. If the image is for decorative purposes only, you can check Mark as a decorative image option.
Charts, Graphs, and Tables
Ideally, for the charts and graphs, you should display the data table below. That way the screen reader users can access the data related to graphs and charts. If that is not possible, you can add alt text to charts and graphs. Make sure you include all the relevant information in the alt text. For tables, you can add the table summary in the alt text. Adding the alt text to the chart/graph/table is the same procedure as adding the alt text in images. Make sure you have the chart/graph/table selected, not the contents in it. Once you have the chart/graph/table selected, right-click on it and select Edit Alt text. It may be helpful when writing alt text for charts and graphs to boil down the idea to the bare essentials — what is this graph used to illustrate? What is the gist of what you are trying to get across by using this chart? Visit the accessible content page to learn more about writing proper alternative text.
Shapes, Icons, SmartArt, and 3D Models
Adding alt text to shapes, icons, SmartArt and 3D models is the same as the images. Select and right-click the object, click on Edit Alt Text to add the alt text.
If your PowerPoint slide includes multiple shapes or flow charts, it is important to add the alt text, so the information is accessible to the screen readers. To do so, you can use the feature called Group if all the objects convey the same meaning. Below is the step-by-step process to group images and add alt text:
- Select all the images in your slide. You can do this by clicking and dragging your mouse pointer, or you can click on one image and hold down CTRL/COMMAND + to click to select other images.
- Once you have all the images selected, go to Drawing Tools > Format > Group.
- When you click on Group, PowerPoint will group all the images into one.
- Now you can right-click the grouped image and click on Edit Alt Text to add the alt text.
- If you need to make changes in the grouped image, you can go to Format > Group > Ungroup to ungroup the images.
Another option for adding alt text
For some PowerPoint versions, the alt text option may not be available when you right-click on the image. In that case, to add alt text:
- Right-click on the image and select Format Picture.
- Click on Layout and Properties.
- Select Alt text, and add the title and description.