Layer 0 --- Default Layer
Layer 1 (left layer) --- Function & Navigation
Layer 2 (right layer) --- Numbers & Symbols
Layer 3 (tri layer) --- Number Pad, Bluetooth & Mouse
Mouse emulations have been added to Layer 3 (the above figure is not updated), check Corne Config for more info.
ZMK use key positions for combos, the 34 key matirx is defined as
