Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

keymap.c
#include QMK_KEYBOARD_H

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

	[0] = LAYOUT_ortho_5x4(
		KC_PMNS, KC_PAST, KC_PSLS, MO(1),
		KC_PPLS, KC_P9, KC_P8, KC_P7,
		KC_TAB, KC_P5, KC_P6, KC_P4,
		KC_PENT, KC_P3, KC_P2, KC_P1,
		KC_DEL, KC_SCLN, KC_PDOT, KC_P0),

	[1] = LAYOUT_ortho_5x4(
		KC_NLCK, KC_PSCR, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, RESET),

	[2] = LAYOUT_ortho_5x4(
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),

	[3] = LAYOUT_ortho_5x4(
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
		KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),

};