qmk_firmware/keyboards/numatreus/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

// 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,
  _LOWER,
  _RAISE,
};

enum custom_keycodes {
  QWERTY = SAFE_RANGE,
  LOWER,
  RAISE,
};


const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  [_QWERTY] = LAYOUT( /* Qwerty */
     /*
   * Q      W      E      R      T       ||      Y     U     I     O     P
   * A      S      D      F      G       ||      H     J     K     L     ;
   * Z      X      C      V      B       ||      N     M     ,     .     /
   * SFT    TAB    CTL    LW   space bksp||ALT   Ent   RS    -     '     =
   */
    KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,                      KC_Y,    KC_U,    KC_I,    KC_O,    KC_P    ,
    KC_A,    KC_S,    KC_D,    KC_F,    KC_G,                      KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN ,
    KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,                      KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH ,
    KC_LSFT, KC_TAB, KC_LCTL,  MO(_LOWER), KC_SPC, KC_BSPC, KC_LALT, KC_ENT,  MO(_RAISE), KC_MINS, KC_QUOT,  KC_PEQL
  ),

   /*
   *  1       2     3     4     5        ||     6    7     8     9    0
   * F1     F2      F3    F4    F5       ||     F6   F7    F8    F9    F10
   * F11    F12     (     )     &        ||     `     [      ]   +   \
   * lower  insert super shift space bksp|| alt Ent   fn    .    -    =
   */
  [_RAISE] = LAYOUT( /* [> RAISE <] */
    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                     KC_6,    KC_7,    KC_8,   KC_9, KC_0 ,
    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_LPRN, KC_RPRN, KC_AMPR,                   KC_GRV,  KC_LBRC, KC_RBRC, KC_PSLS, KC_BSLS ,
    KC_NO,   KC_INS,  KC_LGUI, KC_LSFT, KC_SPC, KC_BSPC, KC_LALT, KC_ENT,  KC_TRNS, KC_DOT, KC_PMNS, KC_EQL  ),


  /*
   * !        @     #    $     %        ||       ^    &    *     (    )
   *  DEL    ESC                        ||      PGDN  PGUP PSCR
   *  CAPS  volup        ENT   reset    ||                        UP  
   *       voldn  super shift space bspc||  alt  ent        LEFT  DOWN  RGHT
   */
  [_LOWER] = LAYOUT( /* [> LOWER <] */
    KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC,                 KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN  ,
    KC_DELT, KC_ESC,  KC_NO,   KC_NO,   KC_NO,                   KC_PGDN,  KC_PGUP,   KC_PSCR,  KC_NO,  KC_NO,
    KC_CAPS, KC_VOLU, KC_NO,   KC_ENT,  RESET,                   KC_NO,    KC_NO,     KC_NO,    KC_UP,  KC_NO  ,
    KC_NO,   KC_VOLD, KC_LGUI, KC_LSFT, KC_SPC, KC_BSPC, KC_LALT, KC_ENT,  KC_NO,     KC_LEFT, KC_DOWN, KC_RGHT ) 
    
};