Figure 1. Brightness control keys. To adjust the display brightness, use the brightness control keys in the front panel. Select one of the following: To increase brightness, press the + key. To decrease brightness, press the − key. When you use the front panel keys, the touch screen is deactivated. Stop pressing the front panel key. The default data page is displayed after a 3‑second timeout. You can also adjust brightness using the touch screen in the Maintenance mode. Related tasksAdjusting brightness using touch screen