diff --git a/docs/source/tutorial.rst b/docs/source/tutorial.rst
index 4e9f8de..088f15d 100644
--- a/docs/source/tutorial.rst
+++ b/docs/source/tutorial.rst
@@ -1,31 +1,44 @@
 .. ndnSIM: NS-3 based NDN simulator documentation master file
 
-Welcome to ndnSIM NS-3 based NDN simulator
-==========================================
+Welcome
+=======
+
+The ndnSIM is NS-3 module that implements Named Data Networking (NDN) communication model, the clean slate Internet design. ndnSIM is specially optimized for simulation purposes and has a cleaner and more extensible internal structure comparing to the existing NDN implementation (NDNx).
 
 We invite you to `join our mailing list <http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim>`_ to see and participate in discussions about ndnSIM implementation and simulations in general (`mailing list archives <http://www.lists.cs.ucla.edu/pipermail/ndnsim/>`_).
 
-
 Contents:
 
 .. toctree::
-   :maxdepth: 4
+    :maxdepth: 4
 
-   intro
-   getting-started
-   helpers
-   cs
-   fw
-   applications
-   examples
-   metric
-   ndnsim-packet-formats
-   faq
-   ndnsim-research-papers
+    intro
+    getting-started
+    helpers
+    cs
+    fw
+    applications
+
+.. toctree::
+    :maxdepth: 2
+
+    examples
+    metric
+    ndnsim-packet-formats
+    faq
+    ndnsim-research-papers
+
+.. toctree::
+    :hidden:
+    :glob:
+
+    new-packet-formats
+    meta/*
+
 
 -------
 
-If you refer to ndnSIM in a published work, please cite the following paper, not just the ndnSIM website. Thank you! 
+If you refer to ndnSIM in a published work, please cite the following paper, not just the ndnSIM website. Thank you!
     **A. Afanasyev, I. Moiseenko, and L. Zhang, "ndnSIM: NDN simulator for NS-3," NDN, Technical Report NDN-0005, 2012** (`BibTex <http://lasr.cs.ucla.edu/afanasyev/bibwiki/bibtex/367>`_)
 
 .. * :ref:`search`