Tap the arrow below the GPS Position Window button to display the dropdown
list.
Tap GPS Preferences.
In the GPS Preferences dialog box, tap the right arrow button until the Alerts
tab is displayed.
Tap the Alerts tab to display the Alerts page.
Check the Visible check box for the Approaching Destination alert to display a
message box, when the alert is activated.
Check the Sound check box to play a sound when the alert is activated.
If the Visible check box is checked, the Approaching Destination message box
will be displayed when the distance to the destination is less than the
specified alert distance.