qmk_firmware/keyboards/framework/numpad/numpad.h

// Copyright 2022-2023 Framework Computer
// SPDX-License-Identifier: GPL-2.0-or-later

// Same as macropad with a few keys removed
#define LAYOUT( \
    H1,    H2,    H3,    H4, \
   K90,   K95,  K100,  K105, \
   K91,   K96,  K101,        \
   K92,   K97,  K102,  K106, \
   K93,   K98,  K103,        \
       K99,     K104,  K108  \
) \
{ \
  {   K90,   K91,   K92,   K93,   K95,   K96,   K97,   K98 }, \
  {   K99,  K100,  K101,  K102,  K103,  K104,  K105,  K106 }, \
  {  K108,    H1,    H2, KC_NO,    H4, KC_NO, KC_NO, KC_NO }, \
  { KC_NO, KC_NO, KC_NO, KC_NO,    H3, KC_NO, KC_NO, KC_NO }, \
}

enum _layers {
  _NUMLOCK,
  _FN
};