Alternative text, alt text, is a description that is read aloud through screen readers used by a visually impaired person. When inserting images and other graphics, such as charts, into your documents, you should always be careful to always add alt text that clarifies for those who cannot see your document but have it read aloud.
It is recommended that you use short alternative texts and that you focus on what is important in the image when writing the alternative text.
Follow these steps to enter alt text
After you insert an image into your document, the image usually gets an automatically generated alt text. You should always check the alt text and possibly change it to an appropriate text.
If you want to change it, right-click on the image and select "Edit alt text". You can enter your own text or use the "Generate a description for me" button to get the auto-generated description.
You do the same to add alt text to pictures, charts, drawn shapes, or other objects. When you right-click on the image/chart/object, a context menu will appear with the "Edit alt text" command. Click on that and type the desired alt text in the panel that appears (see image below).