Full Header Disappeared

Hi,

my kmail installation seems to have lost the ability to display the full 
header of an email. By default I can just configure a header view "KMail5.2", 
if I install kdepim-addons I get in addition "short" and "decorative header" 
(translated back to English, i.e. the real English names could be slightly 
different).

I am running kmail 5.9.1 on KDE frameworks 5.49.0 (Debian buster).

Any hint on how I get the ability back to switch to a "full header" view is 
welcome...

Thanks
Rainer
-- 
Rainer Dorsch
http://bokomoko.de/