As an instructor, you can verify all external links throughout your course to ensure they are valid. You can check these links using the course link validator, which searches through course content and returns invalid or unresponsive external links in both published and unpublished content. However, please note that some links flagged as unresponsive are inaccessible by Canvas servers and will still work for students.

The link validator also includes deleted links. Deleted links are links that are still in the course, but their linked content has been deleted (such as a course file or page).

On the assignment submission details page, some of your graded assignments may appear as file upload attachments that include a View Feedback button. Instead of leaving comments directly on the assignment, your instructor may choose to include comments directly in the assignment using annotations, or inline comments. These comments are made using Crocodoc, which you can also use to reply to any comments or make your own annotations.

Some browsers may not initially render comments correctly when viewing feedback. If your browser includes a built-in PDF viewer, select the option to view the PDF in the system viewer. You can also download PDF files with comments to view on your computer. The settings required to view or print the annotations in the PDF vary based on the software installed on your computer.

Note: If the assignment attachment displays a Preview button instead of the View Feedback button, your file is not Crocodoc compatible and will not include any annotated comments.