Garmin GPS 55AVD - Manual (Page 34)

4-4
The GPS 55 will automatically turn the backlighting off after a specified
number of seconds (backlighting is restored by pressing any key). If you are
using battery power, this feature will help you extend battery life.
To change the timeout period...
· With the cursor under the light timeout period, enter a non-zero value.
· To disable the backlighting timeout, simply enter zero (this means the
backlighting will never turn off while the unit is operating).
4.5 AUDIO SETTINGS
Tone Select
AUDIO SETUP PAGE
The Audio Setup Page allows you to select the characteristics of the audio
tones.
To select audio tones...
· With the cursor under the tone select field, press MORE until the
desired tone setting is selected. Select “ALL TONES” to turn on both
message and keypress feedback, “MSG TONE” to turn on message
tone only, or “NO TONES” to turn off both.
4.6 NAVIGATION UNITS
Units
Select
UNITS PAGE
The GPS 55 allows you to select the distance, speed, and altitude units that
best suit your needs.