diff --git a/ESP-IDF_Robot/tutorial/docs/source/index.rst b/ESP-IDF_Robot/tutorial/docs/source/index.rst
index a363a912d..1d9207ca6 100644
--- a/ESP-IDF_Robot/tutorial/docs/source/index.rst
+++ b/ESP-IDF_Robot/tutorial/docs/source/index.rst
@@ -9,7 +9,8 @@ ByteRider documentation
 .. image:: _static/ESP-IDF_Robot.jpg
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 3
+   :numbered:
 
    intro
    overview