diff --git a/src/Bundle/ChillMainBundle/Form/Type/PickUserDynamicType.php b/src/Bundle/ChillMainBundle/Form/Type/PickUserDynamicType.php
index aab9d4c51..2d6c5972a 100644
--- a/src/Bundle/ChillMainBundle/Form/Type/PickUserDynamicType.php
+++ b/src/Bundle/ChillMainBundle/Form/Type/PickUserDynamicType.php
@@ -24,6 +24,13 @@ use Symfony\Component\Serializer\SerializerInterface;
 
 /**
  * Pick user dymically, using vuejs module "AddPerson".
+ *
+ * Possible options:
+ *
+ * - `multiple`: pick one or more users
+ * - `suggested`: a list of suggested users
+ * - `as_id`: only the id will be set in the returned data
+ * - `submit_on_adding_new_entity`: the browser will immediately submit the form when new users are checked
  */
 class PickUserDynamicType extends AbstractType
 {