NISSAN 2011 Versa Hatchback - Owner's Manual - Manual (Page 29)

Adjustment
Adjust the headrest so the center is level with the
center of the seat occupant’s ears.
To raise the headrest, pull it up. To lower, push and hold the lock knob and push
the headrest down.
WRS0134 LRS0888 LRS0889
1-10 Safety—Seats, seat belts and supplemental restraint system