To raise the headrest, pull it up. To lower it, press the lock release button and push the headrest down. To move the headrest forward, pull on the top.
Pulling the top of the headrest as far as it can go will return it to the upright position.
The headrest is most effective when it is close to your head. Therefore, using a cushion on the seatback is not recommended.

CAUTION: Adjust the top of the headrest so that it is closest to the top of your ears. After adjusting the headrest, make sure it is locked in position. Do not drive with the headrests removed.