User Manual

At the top you'll see a section where the GPIO pins are defined

If you don't see this, you may have the wrong WiFiNINA library installed. Uninstall it and re-install the Adafruit one

linked above.

You do not need to change any of these pins - they're pre-defined in the board definition for the Metro M4 WiFi but

you still will want to have our version of the library installed because you can switch to the AirLift shield or breakout.

Make sure you select Metro M4 AirLift

not

Metro M4 Express!

Compile and upload to your board.