How to update a contributed theme using Composer and the administrative interface for running the Database Updates script.

How to add a reference field that connects two content types.

How to make content items more presentable.

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

How to add and configure a new content type.

How to add fields to a content type.

How to edit a content entry form.

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

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.