Some theme settings won't show until you're viewing the page in the theme editor preview window to which they relate - product, collection, article and blog settings all fall into this category. Be sure to navigate to the page you want to edit, to see the options available in the left sidebar of the theme customizer!
Choose from grid or collage for your collection listing pages. It's also possible to create additional collection listing pages with a different subset of your collections - allowing you to group your products in different ways - perhaps by brand or by target audience. These additional custom collection listing pages use a menu of links and a separate page template called page.list-collections. We've written an article to explain how to create more collection listing pages.
Enable infinite scroll to load in new products as the user reaches the end of a page and as with the collections list choose from a grid or collage layout.
If your collection page grid looks uneven, check to see if you have enabled the collage layout.
The ability to filter products can be a useful feature on the collection page. The Showcase theme allows you to create filters using product tags. Tags can be added to any product in your Admin. The theme has a choice of designs for tag filtering - either a tag group filter option which is shown as a sidebar on desktop, or a simple filter dropdown. This article explains more about setting up your tag filter groups.
Choose either wide or narrow product pages (new to version 4).
Choose image layout to be one column or two column. The latter will mean there's less scrolling for the user (new to version 4).
Choose traditional drop downs or list out your variant options. When using the listed layout, sold out single-variant products or variants which are unavailable will be shown as crossed through.
Change the cart type here to toggle whether the user is taken to the Cart page immediately after clicking the buy button on if they remain on the current page (this option is sometimes known as AJAX add to cart)
To create a contact page for your store. Add a new page in Admin > Pages and then select the template page.contact
The theme includes an option to create a story page. This is similar to a standard page but uses a unique page template (page.story) which allows you to add content blocks to your page in a similar way to the sections on a homepage. This article explains more about how to use your story page.