Four-way lumbar support is adjusted using the four-way button (the round one) located on the side of the seat cushion. The lumbar support can be adjusted forward/backward and up/down.
Adjusting lumbar support
- Press the four-way button up
/down 
to move the lumbar support upward/downward. - Press the front part
of the four-way button to increase lumbar support. - Press the rear part
of the four-way button to decrease lumbar support.