diff --git a/6.x/crud-columns.md b/6.x/crud-columns.md
index 9cb261f..062e92d 100644
--- a/6.x/crud-columns.md
+++ b/6.x/crud-columns.md
@@ -740,6 +740,8 @@ The select_multiple column will output a comma separated list of its connected e
    'entity'    => 'tags', // the method that defines the relationship in your Model
    'attribute' => 'name', // foreign key attribute that is shown to user
    'model'     => 'App\Models\Tag', // foreign key model
+   // OPTIONAL
+   'separator' => ',', // if you want to use a different separator than the default ','
 ],
 ```