How can my students annotate a PDF or image file assignment in Canvas?
When the teacher creates the assignment, be sure to insert it as a FILE (left side option). As long as the students have the clickable file link they can open the assignment right in the canvas app and an annotation tool becomes available. They do not have to even leave the canvas student app to complete the assignment!
If you have an image you want students to annotate, first export it as a pdf then upload it the same way. So if you open your image with Preview, click on File, Export as PDF.
Here’s a tutorial of what it looks like from the students’ perspective:
Creating a Quiz in Canvas