In this episode you will learn how to add custom routes, make some parameters optional, and add requirements for other parameters.

When a validation error occurs, Rails helpfully wraps the field in a div tag so you can style it. But sometimes you don't want this behavior. In this episode you will see how to customize it.

Customize editor colorization.

Very advanced behavior adjusting customizations can be done in a matter of minutes by making good use of scope selectors and language grammars. This screencast shows a few of these.