qmk_firmware/keyboards/standaside/standaside.h

#ifndef STANDASIDE_H
#define STANDASIDE_H

#include "quantum.h"
#define ___ KC_NO

// This a shortcut to help you visually see your layout.
// The first section contains all of the arguments
// The second converts the arguments into a two-dimensional array

#define LAYOUT_ortho_4x16( \
    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K10, K11, K12, K13, K14, K15, \
    K16, K17, K18, K19, K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K30, K31, \
    K32, K33, K34, K35, K36, K37, K38, K39, K40, K41, K42, K43, K44, K45, K46, K47, \
    K48, K49, K50, K51, K52, K53, K54, K55, K56, K57, K58, K59, K60, K61, K62, K63 \
) \
{ \
    { K00, K02, K04, K06, K08, K10, K12, K14 }, \
    { K01, K03, K05, K07, K09, K11, K13, K15 }, \
    { K16, K18, K20, K22, K24, K26, K28, K30 }, \
    { K17, K19, K21, K23, K25, K27, K29, K31 }, \
    { K32, K34, K36, K38, K40, K42, K44, K46 }, \
    { K33, K35, K37, K39, K41, K43, K45, K47 }, \
    { K48, K50, K52, K54, K56, K58, K60, K62 }, \
    { K49, K51, K53, K55, K57, K59, K61, K63 } \
}

#endif