diff --git a/doc/index.rst b/doc/index.rst
index 08a2117..32d07a9 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -1,4 +1,9 @@
 ChronoChat Manual
 ===================================================================
 
+0. Before open ChronoChat, make sure ndnd is running on your machine, and your default key and certificate have been generated and installed . 
+1. When you open ChronoChat App, you will see a contact panel as shown below.
+
 .. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chronochat-1.png
+
+