Specify the search parameter values for the automatic search of ASIN/ISBN for your products.
Select a Magento Attribute that contains a value of ASIN/ISBN for the Products you are going to list.
Select a Magento Attribute that contains a value of UPC/EAN for the Products you are going to list.
Search under ASIN/ISBN and UPC/EAN is also available during the List action as M2E Pro rechecks if there is the corresponding existing ASIN/ISBN in Amazon Catalog for your Magento Product.
Enable/disable the automatic search based on the Product Name value.
At any time, you can edit Search Settings of your Listing. For that, go to Amazon > Listings and use the individual actions menu next to the Listing. Or click Edit Settings > Search on top of the individual Listing page.