qmk_firmware/keyboards/kbdfans/niu_mini/keymaps/via/keymap.c

#include QMK_KEYBOARD_H

#define LOWER FN_MO13
#define RAISE FN_MO23

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

    /* Layer 0
     * ,-----------------------------------------------------------------------------------.
     * | Tab  |   Q  |   W  |   E  |   R  |   T  |   Y  |   U  |   I  |   O  |   P  | Bksp |
     * |------+------+------+------+------+-------------+------+------+------+------+------|
     * | Esc  |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   ;  |  "   |
     * |------+------+------+------+------+------|------+------+------+------+------+------|
     * | Shift|   Z  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |  /   |Enter |
     * |------+------+------+------+------+------+------+------+------+------+------+------|
     * | Ctrl |  GUI | Caps |  Alt |Layer1| Space| Space|Layer2| Left | Down |  Up  |Right |
     * `-----------------------------------------------------------------------------------'
     */
    [0] = LAYOUT_ortho_4x12(
        KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,  KC_T,   KC_Y,   KC_U,  KC_I,    KC_O,    KC_P,    KC_BSPC,
        KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,  KC_G,   KC_H,   KC_J,  KC_K,    KC_L,    KC_SCLN, KC_QUOT,
        KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,  KC_B,   KC_N,   KC_M,  KC_COMM, KC_DOT,  KC_SLSH, KC_ENT,
        KC_LCTL, KC_LGUI, KC_CAPS, KC_LALT, LOWER, KC_SPC, KC_SPC, RAISE, KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
    ),

    /* Layer 1
     * ,-----------------------------------------------------------------------------------.
     * |   `  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |  F7  |  F8  |  F9  |  F10 |  Del |
     * |------+------+------+------+------+-------------+------+------+------+------+------|
     * |      | Vol- | Vol+ | Mute |      |      |      |  F11 |  F12 |      |      |      |
     * |------+------+------+------+------+------|------+------+------+------+------+------|
     * |      |      |      |      |      |      |      |      |      |      |      |      |
     * |------+------+------+------+------+------+------+------+------+------+------+------|
     * | Reset|      |      |      |      |      |      |      |      |      |      |      |
     * `-----------------------------------------------------------------------------------'
     */
    [1] = LAYOUT_ortho_4x12(
        KC_GRV,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_DEL,
        _______, KC_VOLD, KC_VOLU, KC_MUTE, _______, _______, _______, KC_F11,  KC_F12,  _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        QK_BOOT,   _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
    ),

    /* Layer 2 (r_ Indicates RGB Controls)
     * ,-----------------------------------------------------------------------------------.
     * |      |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  |      |
     * |------+------+------+------+------+-------------+------+------+------+------+------|
     * |      |r_TOG |r_Mode|r_Hue+|r_Hue-|      |      |   -  |   =  |   [  |   ]  |  \   |
     * |------+------+------+------+------+------|------+------+------+------+------+------|
     * |      |BL_TOG|BL_STEP|     |      |      |      |      |      |      |      |      |
     * |------+------+------+------+------+------+------+------+------+------+------+------|
     * |      |      |      |      |      |      |      |      |      |      |      |      |
     * `-----------------------------------------------------------------------------------'
     */
    [2] = LAYOUT_ortho_4x12(
        _______, KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    _______,
        _______, RGB_TOG, RGB_MOD, RGB_HUI, RGB_HUD, _______, _______, KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS,
        _______, BL_TOGG, BL_STEP, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
    ),

    /* Layer 3 (r_ Indicates RGB Controls)
     * ,-----------------------------------------------------------------------------------.
     * |      |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  |      |
     * |------+------+------+------+------+-------------+------+------+------+------+------|
     * |      |r_TOG |r_Mode|r_Hue+|r_Hue-|      |      |   -  |   =  |   [  |   ]  |  \   |
     * |------+------+------+------+------+------|------+------+------+------+------+------|
     * |      |BL_TOG|BL_STEP|     |      |      |      |      |      |      |      |      |
     * |------+------+------+------+------+------+------+------+------+------+------+------|
     * | QK_BOOT|      |      |      |      |      |      |      |      |      |      |      |
     * `-----------------------------------------------------------------------------------'
     */
    [3] = LAYOUT_ortho_4x12(
        _______, KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    _______,
        _______, RGB_TOG, RGB_MOD, RGB_HUI, RGB_HUD, _______, _______, KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS,
        _______, BL_TOGG, BL_STEP, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        QK_BOOT,   _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
    ),
};