qmk-dactyl-manuform-a/keyboards/pteron36/keymaps/default/keymap.c

 /* Copyright HarshitGoel96 2020
  * With permission from mattdibi, the original maintainer of the Redox hardware.
  * 
  * This program is free software: you can redistribute it and/or modify 
  * it under the terms of the GNU General Public License as published by 
  * the Free Software Foundation, either version 2 of the License, or 
  * (at your option) any later version. 
  * 
  * This program is distributed in the hope that it will be useful, 
  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
  * GNU General Public License for more details. 
  * 
  * You should have received a copy of the GNU General Public License 
  * along with this program.  If not, see <http://www.gnu.org/licenses/>. 
  */ 
#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 custom_keycodes {
  _QWERTY
};

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

    [_QWERTY] = LAYOUT_split_3x5_3_encoder(
        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_LBRC,    KC_RBRC, KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,
                                   KC_LGUI, KC_BSPC, KC_SPC,     KC_SPC,  KC_ENT,  KC_RALT
    )
};