If you wish to change your password, you'll first need to login to the site. If you forgot your password, see the article "How do I recover my password?"
1. Click on the menu icon on the top right of the page (to the right of your picture).
2. A menu will appear. Choose the Heading that says Settings and then Account Settings.
3. Under My account settings click Change next to Password to update your password.
4. Type your current password, your new password, and confirm your new password by typing it again. When you're done, click change password.