How to add an image style to reformat an image.

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

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 taxonomy and how it can be used to categorize content in a website.

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

Overview of text formats, filters, editors, and cross-site scripting.

Overview of view modes and field formatters.

Overview of forms and widgets.

How to connect and get involved in the open-source community.

How to find additional material to gain advanced site-building skills.

How to find support for issues faced while developing a site.

Overview of common types of data used in a site.