Your Profile Settings let you set various options. To see them you need to go to your profile page and click on the edit profile link located between your username and your rank.
Options are split into five categories:
This section is for basic information about yourself. Here you can include your gender, first name, year of birth, and school level. Privacy settings are located under Preferences too, as well as the button to delete your account.
Sent Info to Email
Here there are notifications settings that let you specify what kind of emails you want to receive and switch off. You can update your settings so that you are receiving only the notifications that are important to you.
This is the area to change your password. Just input your old password and add a new one - enter it twice to make sure there are no mistakes. Confirm and then click the Change! button.
This section allows you to change your email address. Just type in your password, enter the new email address, and hit Change!.
If you wish to set, change, or delete your profile picture, you can do it here. The top section will let you set or change the picture, whereas the bottom section allows you to delete it entirely.