diff --git a/Robust-Graph-Optimization.md b/Robust-Graph-Optimization.md
index 4b2daf9..e3add89 100644
--- a/Robust-Graph-Optimization.md
+++ b/Robust-Graph-Optimization.md
@@ -1,3 +1,10 @@
+ * [Introduction](#introduction)  
+ * [Configuration](#configuration)  
+  * [ROS](#ros)
+ * [Example](#example)
+ * [Issues](#issues)
+***
+
 ## Introduction
 **RTAB-Map 0.10.6 required** (built with g2o or GTSAM)