Unfortunately, standalone tracking is not available directly in the desktop application — it can be found in the web interface at https://demo.flexibee.eu/c/demo/sady-a-komplety
Alternatively, there are several options available — for example, you can record set information in the item code or name using prefixes such as "SADA.." or "SET..", or use a product group or a price list tree, where you create a "SETS" branch and assign all relevant items to it.