How do I get multiple columns to appear in a reference set selector?

I have a reference set selector inside a dataview, but it is only displaying one column without any heading. There are 3 attributes in the referenced object (2 string & 1 datetime) only the first attribute is being displayed. I can't see any way to control this, but in othe forms (e.g. System.User_NewEdit) I can see more than one column in a reference set selector. How does it work? Thanks.
1 answers

Make sure you set your Descriptive value on attributes and give them a Descriptive name. These are used by reference set selectors to create the columns and headers.