. OPERATION OPERATION 3 - 80 (E) S eat he ight Mov e lever (2) up or down t the seat or down as desired. Lever (2) is also used for adjusting angl e, so s et the sea t to the desired height w hile adjusting t he angle. Adjustment range: 6 0 mm ( 2.4 in) the seat (F) A djustin g headre st heigh Mov e the h eadrest u p or do wn to the desire d height. Adjustment range: 5 0 mm ( 2.0 in) (G) A djusti ng headre st angl Rota te the headrest to the fr ont or rear. (H) L umbar Turn grip (5 ) to adjus t the te nsion applied to the lower back