If you know your password but you want to change it to something else, this guide explains how. If you have forgotten your current password then see the FAQ for How do I recover my password?
Log in to the website.
If you can see the Content Manager (the 'behind the scenes' view of the website), look for your name in the lower-left corner then click on it.
If you can see the website in Preview Mode, then click your name in the lower right corner instead.
Your Profile will appear, showing your name and email address. Click the Change Password button at the bottom of your Profile.
Within the Set Password window, type your current password along with your new password twice. Then click the Set button.
Click the Save button to save your new password.