qmk-firmware/keyboards/basekeys/slice/rev1/keymaps/default_split_backspace/keymap.c

#include QMK_KEYBOARD_H

extern uint8_t is_master;

// Each layer gets a name for readability, which is then used in the keymap matrix below.
// The underscores don't mean anything - you can have a layer called STUFF or any other name.
// Layer names don't all need to be of the same length, obviously, and you can also skip them
// entirely and just use numbers.
enum layer_number {
  _QWERTY = 0,
  _FN,
  _ADJUST,
};

enum custom_keycodes {
  RGB_RST = SAFE_RANGE
};

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  [_QWERTY] = LAYOUT_split_backspace(
  //,------------------------------------------------------------------------|   |---------------------------------------------------------------------------.
       KC_ESC, KC_GRAVE,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,        KC_7,    KC_8,    KC_9,    KC_0, KC_MINS,  KC_EQL, KC_BSPACE, KC_BSPACE,
  //|------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      RGB_MODE_FORWARD,   KC_TAB,    KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,        KC_Y,    KC_U,    KC_I,    KC_O,    KC_P, KC_LBRC,   KC_RBRC,   KC_BSLS,
  //|------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      RGB_MODE_GRADIENT,  KC_CAPS,   KC_A,    KC_S,    KC_D,    KC_F,    KC_G,        KC_H,    KC_J,    KC_K,    KC_L, KC_SCLN, KC_QUOT,    KC_ENT,
  //|------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      RGB_MODE_XMAS,      KC_LSFT,   KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,        KC_B,    KC_N,    KC_M, KC_COMM,  KC_DOT, KC_SLSH,   KC_RSFT,   KC_RSFT,
  //|------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      RGB_TOG,           KC_LCTL, KC_LALT, KC_LALT,           KC_SPC,               KC_SPC,  KC_SPC,                            KC_RALT,   KC_RCTL,   MO(_FN)
  //`------------------------------------------------------------------------|   |---------------------------------------------------------------------------'
  ),

  [_FN] = LAYOUT_split_backspace(
  //,-------------------------------------------------------------------------|   |---------------------------------------------------------------------------.
      KC_ESC,TG(_ADJUST),   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,       KC_F7,   KC_F8,   KC_F9,  KC_F10,  KC_F11,  KC_F12,    KC_INS,    KC_DEL,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      _______,            _______, _______, _______, _______, _______, _______,     _______, KC_PSCR, KC_SLCK, KC_PAUSE,  KC_UP, _______,   _______,   _______,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      _______,            _______, _______, _______, _______, _______, _______,     _______, KC_HOME, KC_PGUP, KC_LEFT,KC_RIGHT, _______,   _______,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      _______,            _______, _______, _______, _______, _______, _______,     _______,  KC_END, KC_PGDN, KC_DOWN, _______, _______,   _______,   _______,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      _______,            _______, _______, _______,          _______,              _______, _______,                            _______,   _______,   _______
  //`-------------------------------------------------------------------------|   |---------------------------------------------------------------------------'
  ),

  [_ADJUST] = LAYOUT_split_backspace( /* Base */
  //,-------------------------------------------------------------------------|   |---------------------------------------------------------------------------.
    XXXXXXX, TG(_ADJUST), XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,     XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,   XXXXXXX,     RESET,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
     XXXXXXX,             XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,     RGB_RST, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,   XXXXXXX,   XXXXXXX,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      XXXXXXX,            XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,     RGB_TOG, RGB_MOD, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,   XXXXXXX,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      XXXXXXX,            XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,     RGB_VAD, RGB_VAI, RGB_HUD, RGB_HUI, RGB_SAD, RGB_SAI,   XXXXXXX,   XXXXXXX,
  //|-------------------+--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------+----------+----------|
      XXXXXXX,            XXXXXXX, XXXXXXX, XXXXXXX,          XXXXXXX,              XXXXXXX, XXXXXXX,                            XXXXXXX,   XXXXXXX,   XXXXXXX
  //`-------------------------------------------------------------------------|   |---------------------------------------------------------------------------'
  )
};