Translations:Help:FAQ:AttitudeMode/4/en

Parameter menu point L does not appear. After menu point K you leave the menu.

Obviously your device doesn't seem to have the firmware with AttitudeControl feature installed. You can check this by connecting your MICORBEAST PLUS / MICROBEAST PLUS HD to the computer using the USB2SYS interface. In StudioX you can see on the device overview page which features are installed on the device. Use StudioX to upgrade to a firmware that contains AttitudeControl feature if necessary.