qmk_firmware/keyboards/evyd13/eon40/rules.mk

# Build Options
#   change yes to no to disable
#
BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
MOUSEKEY_ENABLE = no        # Mouse keys
EXTRAKEY_ENABLE = yes       # Audio control and System control
CONSOLE_ENABLE = yes        # Console for debug
COMMAND_ENABLE = yes        # Commands for debug and configuration
NKRO_ENABLE = no            # Enable N-Key Rollover
BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
AUDIO_ENABLE = no           # Audio output
ENCODER_ENABLE = yes

LAYOUTS_HAS_RGB = no

# Disable unsupported hardware
RGBLIGHT_SUPPORTED = no
AUDIO_SUPPORTED = no
BACKLIGHT_SUPPORTED = no