At first I thought that the "HTML" standard field would allow me to insert a "<div id="detailed-options">", then some more form elements and close it off with "</div>" ... this would have allowed me to hide this entire section of the form, and when the user clicks on a button below the form, it expands....
Since that didn't work at all (the HTML elements get put into a LI, which is kind of odd), is there another way that I can do this?