qmk_firmware/keyboards/keebio/levinson/keymaps/steno/rules.mk

EXTRAKEY_ENABLE = no       # Disable if you run out of usb endpoints. Media keys need this to work.
MOUSEKEY_ENABLE = no        # Mouse keys Uses extra usb enpoints. 
STENO_ENABLE = yes          # Additional protocols for Stenography, requires VIRTSER.
AUDIO_ENABLE = no           # Audio output on port C6
MIDI_ENABLE = no            # MIDI controls
NKRO_ENABLE = yes
BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite