Power Button ControlsOn the Garmin Astro 320, you can access a few controls using the power button.
A quick press of the power button and the info screen shows you Time and Date. It shows the setting for the back light and allows you to increase or lower it.
This screen also shows GPS reception for the handheld plus handheld battery life.
Another of the advantages on this unit is that you can lock the keys.
A quick press of the power button takes you to the info screen.
Press the "out" button to lock the key pad. This keeps you from accidentally changing any buttons or
To unlock the keypad, a quick press of the power button takes you back to the info screen. Press the "out" button again to unlock the key pad.