TomTom Ease Reference Manual page 9

Tap this button to turn the sound on.
sound
Night /Day
Tap this button to set the night color scheme, which reduces the brightness
of the screen and shows the map using dark colors.
This is useful when driving at night or in dark environments such as long
tunnels.
night
Tap this button to set the day color scheme, which increases the brightness
of the screen and shows the map using bright colors.
day
Options
Tap this button to adjust the settings for your device.
For more information, see the chapter Options.
options
Help
Tap this button to see contact details for local emergency services and
other special services, such as veterinary clinics. You can then plan a route
to your chosen service center.
For more information, see the chapter Help.
help
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