diff --git a/wp-content/themes/twentythirteen/functions.php b/wp-content/themes/twentythirteen/functions.php
index 0c13d6afd9..a34121a2e1 100644
--- a/wp-content/themes/twentythirteen/functions.php
+++ b/wp-content/themes/twentythirteen/functions.php
@@ -560,6 +560,25 @@ function twentythirteen_aside_date( $content ) {
 }
 add_filter( 'the_content', 'twentythirteen_aside_date', 8 ); // After embeds, before everything else.
 
+/**
+ * Usability improvement for better viewing of images on attachment pages.
+ *
+ * Moves the focus down to the main content area to by appending an in-page
+ * anchor to attachment link URLs.
+ *
+ * @since Twenty Thirteen 1.0
+ *
+ * @param string $url The image attachment URL
+ * @return string URL with extra anchor appended.
+ */
+function twentythirteen_attachment_link( $url ) {
+	if ( wp_attachment_is_image() )
+		$url .= '#main';
+
+	return $url;
+}
+add_filter( 'attachment_link', 'twentythirteen_attachment_link' );
+
 /**
  * Add postMessage support for site title and description for the Customizer.
  *