Reorder mail fields

[Shill]

I'd been using Netscape 4.x for several months (years?). I'd grown 
used to being able to reorder the mail fields such as subject, 
sender, date, size by drag and drop.

It seems I can't reorder these fields in Mozilla 0.9.3. Is there 
some way to do it? Is this feature not implemented at all? Is it on 
some kind of wishlist?

Shill