Here is Shopify Official Documentation about Products.

General Settings

  1. Navigate Shopify Admin > Themes > Customize.
  2. Swtich to Theme Settings tab on admin panel.
  3. Click Product Page tab.
    Navigate to product theme settings
Product page settings
  • Product images layout: Layout of the products
    Product images layout

    You can choose specific products to have certain product layout. See how to do it.

  • Product options style: Style of the product swatches
    Product swatch style

Product Page Template

  1. Navigate Shopify Admin > Products > Add Product.
  2. Input all fields such as (product name, description, price, tags, vendor, type) to create a new product.
  3. Click Template suffix dropdown and select product layout. Default is carousel layout. You can choose certain products and set them to show images in grid layout.
Navigate to product theme settings