diff --git edit-link-form.php edit-link-form.php
index ad2c6e5..e77b1ea 100644
--- edit-link-form.php
+++ edit-link-form.php
@@ -30,7 +30,23 @@ add_meta_box('linktargetdiv', __('Target'), 'link_target_meta_box', null, 'norma
 add_meta_box('linkxfndiv', __('Link Relationship (XFN)'), 'link_xfn_meta_box', null, 'normal', 'core');
 add_meta_box('linkadvanceddiv', __('Advanced'), 'link_advanced_meta_box', null, 'normal', 'core');
 
+/**
+ * Fires after all built-in meta boxes have been added.
+ *
+ * @since 2.7.0
+ *
+ * @param string  $post_type Post type.
+ * @param object  $link      Link being edited.
+ */
 do_action('add_meta_boxes', 'link', $link);
+
+/**
+ * Fires after all built-in meta boxes have been added.
+ *
+ * @since 3.0.0
+ *
+ * @param object  $link      Link being edited.
+ */
 do_action('add_meta_boxes_link', $link);
 
 /** This action is documented in wp-admin/edit-form-advanced.php */
@@ -110,6 +126,11 @@ wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false ); ?>
 <div id="postbox-container-1" class="postbox-container">
 <?php
 
+/**
+ * Fires before submit link box.
+ *
+ * @since 2.5.0
+ */
 do_action('submitlink_box');
 $side_meta_boxes = do_meta_boxes( 'link', 'side', $link );