For those of you who are iPhone users: Please note that the format of photos on your iPhone (HEIC) can't be processed on Canvas. Therefore, if you upload an image directly from your iPhone, your professor will not be able to open it. You will need to convert your photo into JPEG before submitting it. Here is how to do it:

You can copy photos from the Photos app to the Files app, they can be immediately saved as JPEG files. As a result, this may be the quickest method for converting HEIC/live photos to JPEG on iPhone. Follow the steps below to make it.

Step 1. Go to the Photos app on your iPhone > Choose the photos you’d like to convert.

Step 2. Tap the Share icon in the bottom screen > Choose Copy Photos.

Smartphone share menu open with "Copy Photos" selected

Step 3. Go to the Files app, tap Browse > Choose On My iPhone > Choose a folder you’d like to save the JPEG photos.

Step 4. Press and hold any part of the blank area and tap Paste. Now, you can see the photos are JPEG files on your iPhone.

Bonus: How to take iPhone photos in JPEG in the future?
If you want to stop taking photos in HEIC and save photos in JPG on your iPhone, you can go to Settings > Camera > Tap Formats and choose Most Compatible.

Smart phone camera settings options