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( 'almasi_custom_header_args', array( 'header-text' => false, 'width' => 1260, 'height' => 200, 'flex-height' => true, 'admin-preview-callback' => 'almasi_admin_header_image', ) ) ); } add_action( 'after_setup_theme', 'almasi_custom_header_setup' ); if ( ! function_exists( 'almasi_admin_header_image' ) ) : /** * Create the custom header image markup displayed on the Appearance > Header screen. * * @see almasi_custom_header_setup() * * @since Almasi 1.0 */ function almasi_admin_header_image() { ?>