Ally is a tool in Canvas that benefits all students by improving the accessibility and usability of course materials. It seamlessly integrates into Canvas and automatically checks the accessibility of course content. It provides feedback and step-by-step instructions for remediating specific accessibility barriers and enables students to access alternative formats of your course content, such as audio recordings and/or translated versions of text documents.
https://www.csustan.edu/office-academic-technology/canvas-lms/ally-accessibility