'', 'header-text' => '', 'default-text-color' => '', 'width' => 1400, 'height' => 400, 'flex-width' => true, 'flex-height' => true, 'wp-head-callback' => '', 'admin-head-callback' => '', 'admin-preview-callback' => 'colormag_admin_header_image', ) ) ); } add_action( 'after_setup_theme', 'colormag_custom_header_setup' ); if ( ! function_exists( 'colormag_admin_header_image' ) ) : /** * Custom header image markup displayed on the Appearance > Header admin panel. */ function colormag_admin_header_image() { ?>