Check your version
This tutorial covers a topic in Drupal 7 which may or may not be the version you're using. We're keeping this tutorial online as a courtesy to users of Drupal 7, but we consider it archived.
Omega is a Drupal base theme that provides you with a really nice responsive framework. Omega also provides a lot of configuration options that are accessed through the UI rather than code. So, you can adjust the display settings and know that the underlying framework will be intact.
In this series, we're going to be demonstrating the Omega module by converting an existing Drupal theme into an Omega sub-theme. We'll talk about the HTML and CSS that's involved, and how they work together. We'll be working with theme functions and looking at the Omega best practices around how to break out your theme functions, where to put those, and how to use them.