Display options to sort products in the current collection
When activated, a drop-down list of sort options is displayed in the collections sidebar. Customers can choose to view products with various sort options including Featured, Best Selling, ascending and descending options for Alphabetically, by Date and Price.
The default sort order for each collection is set in your Shopify Admin under Collections. You can set the default sort order by using the drop-down and setting your preference:
To customize the order in which products are displayed when viewing a collection, simply change the default sort order to Manually:
Manually sort is displayed as Featured in the theme, the word Manually is not shown to customers. Customers can enable or disable collection sorting in the theme settings: