Hi All.. I have bought a 2nd hand P3S how do I set it back to factory defaults?.. Thanks

Please note that the camera setting will reset to factory default after rebooting the aircraft.
If you want to reset wifi, switch on the remote controller, turn the gimbal dial to the far right, and toggle the S2 switch back and forth for at least three times.
The remote controller will sound a beep which means resetting it successfully.

DJI Elektra Posted at 2017-11-16 01:40
Please note that the camera setting will reset to factory default after rebooting the aircraft.
If you want to reset wifi, switch on the remote controller, turn the gimbal dial to the far right, and toggle the S2 switch back and forth for at least three times.
The remote controller will sound a beep which means resetting it successfully.

Thanks ...will that set all settings to default . I don't want to take my first flight and it does something strange because the pervious owner had some custom settings.     

All of the settings are controlled from the app so it will more than likely be whatever settings you decide as to how it flys. The reset suggested above is to reset the wifi ssid back to factory settings.