OK, thanks. I guess I did not miss "the obvious" in the sense that I now remember having used this to sort some of my folders alphabetically but just could not figure out where to find it. Now I know. I think it would be much easier (and more standard?) to have different columns (number,order and type user-selectable) with the usual behavior: clicking the column header sorts the selected item(s) one way, clicking it again sorts it the opposite way.
