Forum Discussion
Alt text character limit?
Best practice for Alt Tags is to keep them short and succinct. If you have something that requires more than a short sentence you should provide the user with an alternative descriptive option. In your case, you could provide a hidden link to the diagram description that only a screen reader would pick up.
Thank you Bob for your feedback. I definitely try to keep alt text short and sweet but in this case I had to describe a diagram in words. So it required more characters than normal. I added a button on the screen that I called "diagram description" so that anyone can click it and hear the description of the diagram. The whole course is narrated with SL's text to speech so the learner is already used to the audio being played in the slide. Thanks!