Adding edit steps with images

CONTRIBUTING.md

@@ -13,12 +13,29 @@ You've already completed this step.
 
 We've tried to make editing an existing file as simple as possible. 
 
-- If you're already in the repo, just navigate to the file you want to make the edits to and click the **Edit** button.  
+**To edit a topic**
-- Alternatively, if you're viewing a TechNet page in your browser, click the **Contribute** button on the top right of the page. You will be redirected to the relevant source file in the repo, where you can click the **Edit** button. 
+1.	Go to the page on TechNet that you want to update, and then click **Contribute**.
 
-When you're done, submit a pull request back to the master branch of the official repository. 
+       ![GitHub Web, showing the Contribute link](images/contribute-link.png)
+
+2.	Click the **Pencil** icon (in the red box) to edit the content.
+
+       ![GitHub Web, showing the Pencil icon in the red box](images/pencil-icon.png)
+
+3.	Using markdown language, make your changes to the topic. For info about how to edit content using markdown, see http://aka.ms/windows-op-guide.
+
+4.	Make your suggested change, and then click **Preview Changes** to make sure it looks correct.
+
+       ![GitHub Web, showing the Preview Changes tab](images/preview-changes.png)
+
+5. When you’re done editing the topic, scroll to the bottom of the page, and then click **Propose file change** to create a fork in your personal GitHub account.
+
+       ![GitHub Web, showing the Propose file change button](images/propose-file-change.png)
+
+The Comparing changes screen appears to see what the changes are between your fork and the original content.
+6.	On the Comparing changes screen, you’ll see if there are any problems with the file you’re checking in.
+If there are no problems, you’ll see the message, Able to merge.
 
-After you create the pull request, a member of the writing team will review your changes.
 
 If your request is accepted, updates are published to one of the following places: