Edit a Page
In the upper right corner of a page you want to modify (like this page), click Edit this page.
The page opens in GitHub.
In the upper right corner of the page, click the Edit this file button.
GitHub creates a fork of the project in your GitHub account.
You can make and commit changes in your fork, then open a pull request for these changes.
Make your desired changes, and scroll to the Propose file change box.
Enter a name and description for your new page.
Click the Propose file change button.
The Comparing changes page appears.
Click the Create pull request button.
The site administrators receive a notification about your changes, and they can review and publish the page.
You can track your pull request and comments from your colleagues on the Pull requests tab.