At the top right of your main dashboard page, you will see a gear icon. Click on this icon to view your user information. Click "My Preferences" to view and edit your user preferences.

You will have to scroll down slightly on the opening "My Preferences" window until you see the Password section (depicted below).

1. Enter your current password in the first password box, then enter your new password in the second box, and re-enter it in the third. Keep in mind the password restraints listed to the right, and remember that passwords are case-sensitive.
2. Click save to save your new password