See also:

Explanation of general maintenance items
Additional information on the following items with “ * ”is found later in this section. ...

How to use brightness control and display ON/OFF button
To change the display brightness, push the button. Pushing the button again will change the display to the day or the night display. If no operation is performed within 5 seconds, the display ...

Call volume
Adjusting the incoming or outgoing call volume may improve clarity if reception between callers is unclear. - Incoming calladjusting this setting allows you to hear a difference in volume. - ...