how to load properties from a file when setup data source in data driven testing

In soapui - test step - data source

The third icon is  about  load properties from a file. I tried and can only load one property. I would like to load a property list, 20 or 30 properties, so that I can slip to add properties manually.

Now the file can only be csv or excel. If I change row field to 2 in the popup window import properties, only the second property is added. 

Could you please help me how I can do for the tast?  

Regards.

Jasmine