nüvi 30/40/50 Owner’s Manual 19this information when you update the systemsoftware or purchase additional map data.Navigation SettingsSelect Settings > Navigation.• Route Preference—select a preference forcalculating your route.• Avoidances—select the road types you want toavoid on your routes.Display SettingsSelect Settings > Display.• Color Mode—sets a light background (Day),a dark background (Night), or automaticallyswitches between the two based on the sunrisetime and the sunset time for your current location(Auto).• Screenshot—allows you to take a picture of thedevice screen. Screenshots are saved in theScreenshot folder of the device storage.• Brightness—changes the brightness of thescreen. Decreasing the brightness can savebattery power.Time SettingsSelect Settings > Time.• Time Format—select a 12-hour, 24-hour, or UTCtime format.• Current Time—manually set the time on yournüvi. Select Automatic to have the device set thetime based on your location.Language SettingsSelect Settings > Language.• Voice Language—sets the language for voiceprompts.• Text Language—sets all on-screen text to theselected language.