Profile Preferences:

Canvas includes a set of default notification preferences you can receive for your courses. Notifications are sent to Canvas contact methods as specified in your (1) account. However, you can change the default (2) settings by setting your own notification preferences. These preferences only apply to you; they are not used to control how course updates are sent to other users. To learn more about each notification, default settings, and notification triggers, view the Canvas Notifications PDF.

Tutorial: https://community.canvaslms.com/docs/DOC-1286

Profile Picture:

If your institution has enabled profile pictures, you can add and change profile pictures in your account.

Tips for profile pictures:

Please choose an appropriate picture to represent yourself. Your institution has the right to remove pictures that are not appropriate for a classroom setting.
Images should be square in size to prevent your picture from being resized or distorted.
Files can be any type (.jpg, .png, .gif) or size as long as you have room in your personal files to store the file. Canvas recommends that your profile picture be as small as possible.
Your personal files quota is enforced when uploading a profile picture. If you do not have enough storage space in your personal files, you will not be able to upload your profile picture. Create more space by removing some files in your personal files.

Tutorial: https://community.canvaslms.com/docs/DOC-2863