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] = { /* * ┌───┐ * │ A │ * └───┘ */ [0] = LAYOUT_ortho_1x1( KC_A ) };