Hi. I'm the engineer Kawashima.
We recently published the first chapter of Hello Shopify Themes for free in a blog post, but there was another project that was going on at the same time behind it.
here's the guide you see on page 6 of this book:)

Some of the customization examples introduced in this book can be checked from an explanation video scheduled for later upload to the actual completion screen.

Thank you for waiting a month or more since the publication!
Chapter 3 “Dawn Theme Customization” has been released.
If you already have this book, please use it as a reference material and help to deepen your understanding of Dawn.

* Video audio is discreet because of the recording environment, please raise the volume of your PC when watching.
Here’s a list of videos that explain “Dawn Theme Customization” You can also access it.

This article provides a brief overview of each video description part.

3-1. Overview of Dawn Themes

This part, which will be the beginning of chapter 3, explains the features of Dawn theme as a whole.
We have summarized what kind of design intentions Dawn is, what features it has and what we would like to know before touching the customization examples for each part.

3-2 Creating dynamic sections and blocks

In the 3-2 part, we’ll show you how to create your own FAQ component using a new feature in OS 2.0: Sections Everywhere and section blocking.
Since styling such as CSS is not applied, please use it as a basis for customization.
Not only FAQ components, but also ideas for creating your own sections and blocks are explained in this section.

3-3. Utilization of metafields on product pages

In 3-3 parts, you can leverage Shopify’s meta-field capabilities to add subtitle and release date information to your product.
In addition to treating the generated metafield values as dynamic resources in the theme editor, we also introduce splitting processing combined with Liquid condition branching.
If you are unfamiliar with the section block, please also see the above 3-2 parts.

3-4. Expansion of form for goods and carts

In 3-4 parts, we use Shopify’s Line Item Property and Cart attributes capabilities to extend the data that can be passed to your Shopify management screen.
For example, you can collect engraved word information on products and whether or not there is a hope for gift wrapping only with Liquid's customization.

3-5. Introduction of Japanese font

In the 3-5 part, we introduce customization examples of introducing Japanese fonts to Dawn themes.
Dawn's typography is not optimized for Japanese fonts, so you can look at various approaches such as overwriting with CSS alone.In this section we will add the input field of a Japanese font font-family to our theme editor by editing Sets_schema.

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Video commentary should be able to share what is displayed in the actual browser:)
I would be happy if you could use it as an auxiliary material of the book!