Toyota 2012 Prius Owner's Manual page 181

1-5. Adjustable components (seats, mirrors, steering wheel)
Head restraints
Head restraints are provided for all seats.
Front seats
Lock
release
button
Rear center seat
Lock
release
button
Foldable type rear outside seats
Lock release button
152
PRIUS PHV_OM_OM47818U_(U)
Up
Pull the head restraints up.
Down
Push and hold the lock release
button when lowering the head
restraint.
Up
Down
Pull up or push down the head
restraint while pressing the
lock release button.
To fold
Pull the head restraint up while
pressing the lock release but-
ton.
To use
Lift up and push down the
head restraint to the lowest
lock position.