From a Home screen, navigate: Apps > Settings > Display.
Tap Screen timeout then tap an option (e.g., 15 seconds, Never, etc.).
Tap Front touch key light then tap Turn on front key light to enable or disable. Enabled when a check mark is present. When Front touch key light is enabled, tap Front touch key light duration then select duration (e.g. 1.5 seconds, Always on, etc.).
Tap Notification flash then select an option (e.g. Messaging, Voicemail, etc.). Enabled when a check mark is present.
Tap Motion sensor calibration then tap Calibrate sensor. When calibrating, ensure that the device is placed on a flat and level surface.