Here is Shopify Official Documentation about Products.
- Navigate Shopify Admin > Themes > Customize.
- Swtich to Theme Settings tab on admin panel.
- Click Product Page tab.
- Product images layout: Layout of the products
You can choose specific products to have certain product layout. See how to do it.
- Product options style: Style of the product swatches
Product Page Template
- Navigate Shopify Admin > Products > Add Product.
- Input all fields such as (product name, description, price, tags, vendor, type) to create a new product.
- 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.