Reset: Allows you to reset user data and settings (Resetting All Default Settings, page 35). Software Update: Allows you to install software updates downloaded using Garmin Express. Time Settings Hold MENU, and select Settings > System > Time. Time Format: Sets the device to show time in a 12-hour, 24hour, or military format. Set Time: Sets the time zone for the device. The Auto option sets the time zone automatically based on your GPS position.