Toyota 2012 Yaris Hatchback Owner's Manual page 30

1-3. Adjustable components (seats, mirrors, steering wheel)
Vehicles with a non-split rear seat
48
Pull the seatback lock release
knob and fold the seatback
down.
Each seatback may be folded
separately.
Lower the center
restraint to the lowest position.
Pull both seatback
release knobs at the same
time and fold the seatback
down.
head
lock