If the scanner loses power (as when you turn off your car’s ignition with the
scanner’s power switch on), it can lose some system settings such as display
color and backlight. To ensure that such settings persist, either change the
setting using the scanner’s menu or power the scanner off then back on using
the power switch after making such setting changes.When you turn off the
scanner using the power switch, the scanner remembers the last settings and
mode. When you turn power back on, it resumes the previous mode.