The Shopify theme “Dawn” allows you to choose either one or two columns to display on the mobile screen by default, but with a little tweaking, you can also display three columns.
Sample Codes
Test Theme :Dawn/Rise 15.2.0
Add scheme to "main-collection-product-grid.liquid" and "featured-collection.liquid".
Add labels to two places in "ja.schema.json"
Adding styles to base.css (part 1)

- Choosing a selection results in a full page refresh.
- Opens in a new window.