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+ChronoChat Manual
+===================================================================
+
+**Step 0**: Before open ChronoChat, make sure ndnd is running on your machine. 
+If you have installed `NDNx Control Center`_, check if its tray icon shows up
+
+.. _NDNx Control Center: http://named-data.net/download/
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/ncc.png
+
+You also need to have your default key generated and certificate installed.
+To check that, you can use a command line tool **ndnsec-ls-identity**, and you should see output similar to:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/ndnsec-ls-identity.png
+
+If you see nothing or something different in output, please go to `NDN Certifications`_ to set up your security environment.
+
+.. _NDN Certifications: http://ndncert.named-data.net/
+
+**Step 1**: When you open ChronoChat App, you should see a contact panel as shown below.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chronochat-1.png
+
+You should see **Setting** button at the bottom of the panel. 
+You can change your identity and setting there.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/setting-dialog.png
+
+The default setting is derived from the key and certificate you installed in step 0. 
+
+The left part of the panel is your contact list. 
+One must be one of your contacts if she/he wants to have a chat with you.
+Right now, it is empty, so let's add some contacts. 
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chronochat-2.png
+
+**Step 2**: Click the **Add** button in the lower left corner. 
+You should see a "Browse Contact" dialog which collects all the existing contact certificate in the testbed, for example:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/browse-contact-1.png
+
+You can select the contact you want to add, and then click the **Add** button.
+Then you should see that the selected contact has been added into your contact list.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chronochat-3.png
+
+If you know a contact's certificate name, you can add it directly via **Direct Add** button.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/browse-contact-2.png
+
+You should see an "Add Contact" dialog, you can directly input the contact certificate name (without version number, e.g., /ndn/edu/ucla/KEY/cs/afanasev/ksk-1383327806/ID-CERT) into the **Contact** line, and then click **Fetch** button.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/add-contact-1.png
+
+If the certificate can be fetched and verified, the dialog will show you the description about the certificate subject.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/add-contact-2.png
+
+You can click **Add** to add the contact into contact list.
+
+**Step 3**: Now you can start a chatting room with you contacts. 
+You can right click the contact you want to chat, and then select **Chat**. 
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chronochat-4.png
+
+You should see a "Start Chating" dialog:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/start-chat.png
+
+You can click **OK** button, and then you will enter the chat room, and a chat invitation will be sent to the contact.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chatdialog-1.png
+
+If you see some red warning at the top of your chatroom window, such as:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chatdialog-3.png
+
+You can click the tray icon of the chat room to update your local prefix, such as:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/update-prefix.png
+
+After that the red warning should disappear and your current prefix will turn green.
+
+**Step 4**: At the contact side, the contact will got a inviation notification if the contact has also added you as a contact:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/invitation-notify.png
+
+The contact may **Accept** or **Reject** your invitation. 
+Once your inviation is accepted, contact will enter the chat room, and both of you should see each other:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chatdialog-2.png
+
+Now you can chat with people in the chat room.
+
+**Step 5**: If you want to add more contacts into the chat room, you can invite them by clicking the **Invite** button.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chatdialog-4.png
+
+Then a contact list will pop up and you can select other contact to invite:
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/invite.png
+
+When the invited contact accept your invitation, you should see the contact enter the chat room.
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chatdialog-5.png
+
+**Step 6**: Enjoy chatting with others!
+
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/chatdialog-6.png
+