Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
#include QMK_KEYBOARD_H const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { [0] = LAYOUT( LCTL(KC_Z), LCTL(KC_X), LCTL(KC_C), LCTL(KC_V) ) };