[O] Formatting clock tables in the agenda

[Tommy Kelly]

I have a clock table in my agendas -- I got it there by setting
org-agenda-start-with-clockreport-mode. I'm trying to control its
format. I've tried using org-clock-clocktable-default-properties but
that seems to have no effect. For example, this from my
custom-set-variables:

 '(org-agenda-start-with-clockreport-mode t)
 '(org-clock-clocktable-default-properties (quote (:maxlevel 2 :scope
file :indent t :link t)))

The presence/absence of that second line makes no difference to how my
agenda clocktable looks.

How do I control that particular table's format?

thanks
Tommy