Find the lever or button underneath your La-Z-Boy office chair, which controls the seat height of your chair. Pull the lever up or press the button to control the seat's height. While the lever is pulled or the button is pushed, move the chair's seat up or down.
Find the knob or button on the back of your La-Z-Boy office chair, which allows the back of the chair to move up or down. Turn the knob or press the button to control the back of the chair. Move the chair's back up or down by turning the knob or while pressing the button. Test this out to make sure your lower back is resting securely against the back of the chair.
Adjust the arm rests of your La-Z-Boy office chair with the knob or button underneath the arm rests. Turn the knob to move the arm rests up or down, or move them to an appropriate height while pushing the button.