You must go under your profile that is found on the top right of your screen by clicking on your picture / initials. It's the Other menu on the mobile phone.
A) Add/Change a photo
Click on "Add" or directly on the photo input to add a photo to your Agendrix profile.
B) General Information
Name and surname: You can change these at any time
Email: Part of your connexion credentials
Phone number: Your phone number will be used for SMS notifications via the "My Notifications" tab