ATUM Multi-Inventory premium add-on lets you add different sorting modes to inventories within a product. You have the option to set a different sorting mode for each individual product or to set a global sorting mode from the Multi-Inventory menu within the ATUM Settings page.

SET THE GLOBAL INVENTORY SORTING MODE

• On the WordPress admin panel, go to ATUM Inventory > Settings > Multi-Inventory.

• You can choose one of the store-wide options within the Inventory Sorting Mode section.

For more details about the options, read here.

• Click Save Changes.

SET THE INVENTORY SORTING MODE FOR SPECIFIC PRODUCT

• On the WordPress admin panel, navigate to Products and open-edit a product you want to set selling priority.

• Navigate down the Product page to the Product data section and select the tab called ATUM Inventory.

• In Multi-Inventory Settings select the inventory Sorting Mode for this product.
  For more details about the options read here.

• To activate the change click the product Update button.