Garmin Aera 660 Pilot's Manual page 151

2) Touch the desired setting:
Unrestricted: All traffic is displayed.
Normal: Displays non-threat and proximity traffic from 2,700 feet
above the aircraft to 2,700 feet below the aircraft. Typically used
during enroute phase of flight.
Above: Displays non-threat and proximity traffic from 9,000 feet
above the aircraft to 2,700 feet below the aircraft. Typically used
during climb phase of flight.
Below: Displays non-threat and proximity traffic from 2,700 feet
above the aircraft to 9,000 feet below the aircraft. Typically used
during descent phase of flight.
Altitude/
Operating
Mode
Traffic System
Status Receiving
Air-to-Air
190-02017-20 Rev. E
Hazard Avoidance
Traffic Display
Range Rings
Traffic Page
Garmin aera 660 Pilot's Guide
Directional
Airborne Traffic
135