Product sorting in Zoho Commerce - how can I influence standard behaviour?

Product sorting in Zoho Commerce - how can I influence standard behaviour?

Hello Zoho, 

I want to sort my products by e.g. name, SKU (Ascending / Descending) or by another attribute. I could neither find any solution in the settings, nor an entry in this help. Can you advice how this would work? 
Seems the standard sorting is "Most Popular" - also it's not clear how "Most Popular" is defined

Thanks in advance, 
Ben