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.
In this lesson we cover adding different type of custom fields to your layout using Display Suite. From adding a custom code field, blocks, to dynamic fields, each of these can be moved around your layout and replicated/modified across different display modes.