get_template_directory_uri() . '/images/banner-1.jpg', 'random-default' => false, 'flex-width' => true, 'width' => 2560, 'flex-height' => true, 'height' => 500, 'uploads' => true, 'header-text' => false, 'admin-preview-callback' => 'flat_responsive_admin_header_image', ) ) ); } add_action( 'after_setup_theme', 'flat_responsive_custom_header_setup' ); if ( ! function_exists( 'flat_responsive_admin_header_image' ) ) : /** * Custom header image markup displayed on the Appearance > Header admin panel. * * @see flat_responsive_custom_header_setup(). */ function flat_responsive_admin_header_image() { ?>