How to delete a content type that is not required for the site.

Overview of reference fields and their commonly-used types.

How to create a taxonomy vocabulary and add it as a field to a content type.

Overview of forms and widgets.

Overview of view modes and field formatters.

Overview of image styles and how they are used to display a single image in several variations.

Overview of responsive image styles, which allow you to provide different images for different screen sizes.

How to make a change to a text format and its editor configuration.