diff --git a/source/development/frontend/models_fieldtypes.rst b/source/development/frontend/models_fieldtypes.rst
index 605762e..9af10c0 100644
--- a/source/development/frontend/models_fieldtypes.rst
+++ b/source/development/frontend/models_fieldtypes.rst
@@ -439,6 +439,25 @@ Validate against a static list of options.
"Multiple", "Y,N", "Allow to select multiple options"
"OptionValues", ":code:`xml`", "Xml structure containing keys and values, when keys should be numeric, the value tag is also supported :code:`option1`"
+
+When the list of available options is relatively large, its also possible to nest the options one level, which
+generates :code:`