diff --git a/README.MD b/README.MD
index d4be0e1..a1e870d 100644
--- a/README.MD
+++ b/README.MD
@@ -20,6 +20,9 @@ supports ROS 2 Foxy, Humble, and Jazzy distributions.
     * [Limitations](#limitations)
   * [Use V4L2 backend](#use-v4l2-backend)
   * [Launch parameters](#launch-parameters)
+  * [ROS2-vs-Optical Coordination Systems](#ros2robot-vs-opticalcamera-coordination-systems)
+  * [Camera sensor structure](#camera-sensor-structure)
+  * [TF from coordinate A to coordinate B:](#tf-from-coordinate-a-to-coordinate-b)
   * [Predefined presets](#predefined-presets)
   * [Depth work mode switch](#depth-work-mode-switch)
   * [Configuration of depth NFOV and WFOV modes](#configuration-of-depth-nfov-and-wfov-modes)