diff --git a/backend/relations.md b/backend/relations.md
index 9f7cd018..b4df576c 100644
--- a/backend/relations.md
+++ b/backend/relations.md
@@ -103,6 +103,8 @@ Option | Type | Description
 `noRecordsMessage` | List | a message to display when no records are found, can refer to a [localization string](../plugin/localization).
 `conditions` | List | specifies a raw where query statement to apply to the list model query.
 `scope` | List | specifies a [query scope method](../database/model#query-scopes) defined in the **related form model** to apply to the list query always. The model that this relationship will be attached to (i.e. the **parent model**) is passed to this scope method as the second parameter (`$query` is the first).
+`allowDismiss` | List | closes the modal when clicking next to it. Default: `false`
+`cssClass` | List | Adds extra CSS classes to the modal. Default: `null`
 **filter** | List | a reference to a filter scopes definition file, see [backend list filters](lists#using-list-filters).
 
 These configuration values can be specified only for the **view** options.