Updating your profile photo is done on your user profile page.
Your profile is accessible in the settings menu on your tablet or desktop computer or by expanding the menu on your phone and tapping on settings.
1) Click on your current profile photo. If you are adding your photo for the first time, your photo will be the default user photo.
2) The profile photo cropping dialog will open. Click browse to select a photo from your computer.
3) Resize and move the crop selection region over your photo to the desired size and position.
4) Press the update button to update finish cropping your profile image.
5) Press the save button to save your profile.