qmk_firmware/keyboards/contra/contra.h

#ifndef KB_H
#define KB_H

#include "quantum.h"

#define LAYOUT_ortho_4x12( \
  K000, K001, K002, K003, K004, K005, K006, K007, K008, K009, K010, K011, \
  K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, \
  K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, \
  K300, K301, K302, K303, K304, K305, K306, K307, K308, K309, K310, K311  \
) { \
  { K000,  K001,  K002,  K003,  K004,  K005,  K006,  K007,  K008,  K009,  K010,  K011 }, \
  { K100,  K101,  K102,  K103,  K104,  K105,  K106,  K107,  K108,  K109,  K110,  K111 }, \
  { K200,  K201,  K202,  K203,  K204,  K205,  K206,  K207,  K208,  K209,  K210,  K211 }, \
  { K300,  K301,  K302,  K303,  K304,  K305,  K306,  K307,  K308,  K309,  K310,  K311 }  \
}

#define LAYOUT_planck_mit( \
  K000, K001, K002, K003, K004, K005, K006, K007, K008, K009, K010, K011, \
  K100, K101, K102, K103, K104, K105, K106, K107, K108, K109, K110, K111, \
  K200, K201, K202, K203, K204, K205, K206, K207, K208, K209, K210, K211, \
  K300, K301, K302, K303, K304,    K305,    K307, K308, K309, K310, K311  \
) { \
  { K000,  K001,  K002,  K003,  K004,  K005,  K006,  K007,  K008,  K009,  K010,  K011 }, \
  { K100,  K101,  K102,  K103,  K104,  K105,  K106,  K107,  K108,  K109,  K110,  K111 }, \
  { K200,  K201,  K202,  K203,  K204,  K205,  K206,  K207,  K208,  K209,  K210,  K211 }, \
  { K300,  K301,  K302,  K303,  K304,  K305,  K305,  K307,  K308,  K309,  K310,  K311 }  \
}

#endif