How to install this

1. In Chrome, open the Bookmarks Manager
2. Right-click on the Bookmarks Bar folder and click Add Page...
   • Name can be whatever you like, e.g. GitHub.present
   • URL: copy-paste all the JS code in bookmarklet.js

You will then have a GitHub.present button in your Bookmarks bar.

How to use this

Go to a GitHub page with Markdown content (typically a README.md page) and click the GitHub.present button.