. OPERATION DETAILED CONTROLS AND GAUGES selected mode when in the maintenance mode, brightness/contrast adjustment mode, or select mode. monitor. (9) or (The selected monitor is inverted to black.) 3 - 31 Input Confirmation Switc Press switch (11) to confirm Liquid Crystal Monitor Adjustment Switch Press s witch (1 2) to adjus t th e brightness o r contrast of the display Adjusting Brightness 1. When monito r adjustment switch monitor displa y scree n changes to t he brightness/contrast screen shown in the diagra m on the ri ght. 2. Use the brightness/contra st screen and press up switch down switch (10) to select brightness of the monitor.