diff --git a/core/themes/seven/templates/custom-block-add-list.html.twig b/core/themes/seven/templates/custom-block-add-list.html.twig
index b5b2b66..fe1d3c3 100644
--- a/core/themes/seven/templates/custom-block-add-list.html.twig
+++ b/core/themes/seven/templates/custom-block-add-list.html.twig
@@ -4,7 +4,7 @@
  * Overrides custom-block-add-list.html.twig.
  *
  * Displays the list of available custom block types for creation.
-
+ *
  * Available variables:
  * - types: A collection of all the available custom block types.
  *   - type: The custom block type, containing all the items below.
@@ -12,6 +12,11 @@
  *   - type.description: A description of this custom block type.
  *   - type.label: The title of the custom block type.
  *   - type.path: A path for the link to add a block of this type.
+ *
+ * @see template_preprocess()
+ * @see template_preprocess_custom_block_add_list()
+ *
+ * @ingroup themeable
  */
  #}
 <ul class="admin-list">