How do I change my default email address in my user account as an observer?
Your default email address is used as your main contact method in Canvas and is added when creating your Canvas account. Email addresses are used to create Canvas notifications; they are not used as a contact method for other Canvas users.
If you add another email address as a contact method, you can change your default email address in Canvas.
Open User Settings
In Global Navigation, click the Account link , then click the Settings link .
View Email Addresses
The User Settings sidebar displays your contact options. View your email address contacts under Email Addresses . Your default email address displays a Star icon .
Choose Default Email Address
To select a new default email address, hover over the preferred default email address  and click the Star icon .