Header screen. * @type string $admin_preview_callback Callback function used to create the custom header markup in * the Appearance > Header screen. * } */ add_theme_support( 'custom-header', apply_filters( 'twentyfourteen_custom_header_args', array( 'header-text' => false, 'width' => 1260, 'height' => 240, 'flex-height' => true, 'admin-head-callback' => 'twentyfourteen_admin_header_style', 'admin-preview-callback' => 'twentyfourteen_admin_header_image', ) ) ); } add_action( 'after_setup_theme', 'twentyfourteen_custom_header_setup' ); if ( ! function_exists( 'twentyfourteen_admin_header_style' ) ) : /** * Style the header image displayed on the Appearance > Header screen. * * @see twentyfourteen_custom_header_setup() * * @since Twenty Fourteen 1.0 */ function twentyfourteen_admin_header_style() { ?> Header screen. * * @see twentyfourteen_custom_header_setup() * * @since Twenty Fourteen 1.0 */ function twentyfourteen_admin_header_image() { ?>