diff --git a/_Sidebar.md b/_Sidebar.md
index 8b53abd..cad4377 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -6,6 +6,7 @@
 - [The official MMS server](./The-official-MMS-server)
 - [Roadmap](./Roadmap)
 - [Versioning Scheme](./Versioning-Scheme)
+- [Explicit contents](./Explicit-contents)
 
 
 ### other