1. Still, if you are already logged in the pick on the arrow in the top right corner of any Facebook Official Page.
2. Then, click to drop-down options choose Settings
3. A new page appears here to pick on Security & Login.
4. Choose on Edit next to Change Password
5. After that, you can enter your new password and a new password
Note: Always use a longer password, better mix the letters with upper & lower case, numbers, & symbols.
6. And the final click on Save Changes.
Your Facebook Password has been completely changed for use.