One of the great features to our embedded widget approach where content lives on your site is that you can edit the content live on your site.
First go to your page where Guides is installed.
Click on the Admin link in the bottom of the page.
A modal will appear for you to login. If you are already logged in it will take you directly to the control panel.
When you are authenticated inside of the widget, special changes are made to improve the experience such as disabling caching for you so you can write and see content immediately. Logged out users see a full page cache for a small time to improve performance.
When you close the modal the page you are on will be refreshed and content changes will be seen immediately.
You will also see an Edit link next to article titles to allow you to easily jump into an article and start writing or editing it.