Launch offers three distinct templates that can be applied to a collection to change the layout.
Connect your collections with the theme's templates
To change the template, leave the theme editor and navigate to any collection in your Shopify admin. On the right-hand side, under Theme templates and a dropdown to change your collection template from the default collection to collection.alternating or collection.random.
In order for these templates to be available in the Collections admin, the Launch theme must be the published theme in the store. Publish the Launch theme to access these templates.