A few weeks ago canvas randomly started adding weird shapes onto previews of documents I need to download for class and I don't know why. Any ideas?
Hello there, @BENJAMINPETERSO ...
Whoa! That's super strange! Have you reached out to the folks at the Canvas Help Desk to report this issue? That's where I would start if it still is an issue for you. Also, you might want to try clearing your browser cache/history...but the Help Desk folks might have you try this as well to see if it fixes anything.
Once you clear your cache/history, close the browser completely, and then re-start the browser to see if Canvas behaves better.
If you want to contact Canvas Support, you can do so via the "Help" menu on the left-hand side global navigation of your Canvas environment. How do I contact Canvas Support? - Canvas Community
I hope this will help a bit! Please come back to post an update after you contact the Help Desk to know how this was resolved...thanks!