How to change the dashboard image?
Here is a link to a guide page with the steps.
How do I add an image to a course card in the Dashboard?
The ability to add dashboard images is a feature option which means it might not be enabled on your instance of Canvas. If you don't see a spot to add it based on the guide page check out this one to see about enabling it in your course How do I manage new features for a course?
If that still doesn't work you may need to speak to your local Canvas admin to see about having them enable it on your Canvas system.
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