Activating NMEA output on serial port

Using an OmniBusF4. I think NMEA output from a serial port is not available because the firmware is ‘limited’ on 1mb boards.

https://ardupilot.org/copter/docs/common-limited-firmware.html#common-limited-firmware

Where in the firmware build libraries can I activate NMEA output for this board (and also inhibit other stuff I don’t need to save space)?

Ok, easily solved by removing the restriction for 1mb boards……