qmk-firmware/keyboards/mt40/keymaps/default
..
config.h
keymap.c
readme.md

Default Layout on a Planck Clone Keyboard

Base Layer

Imgur

FN1 Layer - Numpad and Function keys

Imgur

FN2 Layer - Numbers and Symbols

Imgur

FN3 Layer - Vim

Imgur

FN3 Layer - Multimedia

Imgur