diff --git a/controller.rst b/controller.rst
index c11615d93aa..5da85057bbe 100644
--- a/controller.rst
+++ b/controller.rst
@@ -443,6 +443,27 @@ HTTP status to return if the validation fails::
The default status code returned if the validation fails is 404.
+If you want to map your object to a nested array in your query with a specific key,
+you can use the ``key`` option in your :class:`Symfony\\Component\\HttpKernel\\Attribute\\MapQueryString`
+attribute::
+
+ use App\Model\SearchDto;
+ use Symfony\Component\HttpFoundation\Response;
+ use Symfony\Component\HttpKernel\Attribute\MapQueryString;
+
+ // ...
+
+ public function dashboard(
+ #[MapQueryString(key: 'search')] SearchDto $searchDto
+ ): Response
+ {
+ // ...
+ }
+
+.. versionadded:: 7.3
+
+ The ``key`` option of ``#[MapQueryString]`` was introduced in Symfony 7.3.
+
If you need a valid DTO even when the request query string is empty, set a
default value for your controller arguments::
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