How to enable country selector in the header

Go Online Store - Customize - Header section. Here you can see the Show country selector field. Tick a checkbox to enable it in the header. As a result, you will see the list of countries.

Please note that you should have set the values in Shopify settings before. Only then the values will show up in your store.

To set up the country in Shopify configuration, see the instructions in the article.

To get more information about adding countries and regions to your Shopify store, please read the Managing Markets article.