diff --git a/Dynamic-filtering:-rule-syntax.md b/Dynamic-filtering:-rule-syntax.md
index a95dda5..da847ca 100644
--- a/Dynamic-filtering:-rule-syntax.md
+++ b/Dynamic-filtering:-rule-syntax.md
@@ -29,6 +29,8 @@ A rule always automatically propagates to all subdomains of the source hostname
 
 Given that rules always propagate to subdomains, there is no need to prefix the hostname part with a wildcard `*.`, doing so is invalid and will cause the the rule to be discarded.
 
+By default uBO also applies some special `behind-the-scene` scope rules: [Behind the scene network requests](./Behind-the-scene-network-requests).
+
 The type is the type of the fetched resource.
 
 A request can be blocked (`block`), allowed (`allow`), or ignored (`noop`). A `noop` rule will cause matching network requests to be ignored by the dynamic filtering engine, but those ignored network requests will still be subjected to static filtering (filter lists).