qmk_firmware/keyboards/alter/alter.h

#ifndef ALTER_H
#define ALTER_H

#include "quantum.h"

#define KEYMAP( \
	K000, K001, K002, K003, K004, K005, K006, K007, \
	K010, K011, K012, K013, K014, K015, K016, K017, \
	K020, K021, K022, K023, K024, K025, K026, K027, \
	K030, K031,       K033, K034, K035, K036, K037, \
	K040,       K042, K043, K044, K045, K046, K047, \
	K050, K051, K052, K053, K054, K055, K056,       \
	            K062, K063, K064, K065, K066, K067, \
	K070, K071, K072, K073, K074, K075, K076, K077, \
	            K082, K083, K084,             K087, \
	K090,       K092,             K095  \
) { \
	{ K000,  K001,  K002,  K003,  K004,  K005,  K006,  K007 }, \
	{ K010,  K011,  K012,  K013,  K014,  K015,  K016,  K017 }, \
	{ K020,  K021,  K022,  K023,  K024,  K025,  K026,  K027 }, \
	{ K030,  K031,  KC_NO, K033,  K034,  K035,  K036,  K037 }, \
	{ K040,  KC_NO, K042,  K043,  K044,  K045,  K046,  K047 }, \
	{ K050,  K051,  K052,  K053,  K054,  K055,  K056,  KC_NO }, \
	{ KC_NO, KC_NO, K062,  K063,  K064,  K065,  K066,  K067 }, \
	{ K070,  K071,  K072,  K073,  K074,  K075,  K076,  K077 }, \
	{ KC_NO, KC_NO, K082,  K083,  K084,  KC_NO, KC_NO, K087 }, \
	{ K090,  KC_NO, K092,  KC_NO, KC_NO, K095,  KC_NO, KC_NO }  \
}

#endif