Q_parameters can't be found

VTOL-Vectored tailsitter twin. I go to the full parameter tree and change Q_enable to 3 for vectored tailsitter parameters, then refresh the parameter list, and all I get is the same parameters over again, with Q_enable reset to zero.
OK, I eat crow. What am I doing wrong?

Write the parameter and re-boot the flight controller.

Thanks, Greg. I was overlooking the “write parameters” button.:roll_eyes:
Totally new here-- transplant from OAVTOL and the KK2.1.5 board.