#define EE_HANDS
in your keymap (this is not the default), QMK automatically assumes that whatever half the USB cable is plugged into is the left hand board. Even flashing the .eep files in this case does nothing, as it's ignored unless EE_HANDS
is explicitly set.NKRO_ENABLE = yes
in your rules.mk
, and then pressing the Magic N
command (LShift+RShift+N
by default) to turn on NKRO.