ArduPilot

Sensor Calibration: Accelerometer, compass, and radio.
Flight Modes: Assign modes to your transmitter switches.
Power Setup: Configure battery monitor for analog voltage/current.
MAVLink Ports: Assign protocols to UARTs in SERIALx_PROTOCOL.
OSD: Enable and customize with Mission Planner.
Logging: Enable SPI flash logging (LOG_BACKEND_TYPE = 3).
Failsafe & Safety: Configure arming checks, geofence, RTL.