This procedure will not bring back the drone to factory state, but it will restore default value of latest update, so you will have to check your parameters again.
Here is the ANAFI reset procedure.
1. Power ANAFI on.
2. Press the power button and keep it pressed: after approximately 8 seconds, the smart battery’s LEDs turn red, one after the other.
3. When the four LEDs are red, release the power button.
4. ANAFI reboots: a “.TXT” file has been generated on the drone’s microSD card; it contains ANAFI’s Wi-Fi network’s original password and that is how you can check the reset procedure has been successful.