threads

hello 

i would like to knwo which variable defines the display
of a line in the thread index for a single message who
is not a thread ( i.e that has no reply or possible follow up ).

the <TTopBegin> tag defines thread, but i would like the other
singles messages in the thread index to be displayed the same
way ( date then title then author .... )
What is the tag for that please ?

Thank you