getting rid of the tree view of a message

[Perry]

Le Monday 16 August 2010 06.46:08 Michael Hirsch, vous avez écrit (you wrote) 
:
> I just upgraded my family to KDE 4.5.  Now my wife is pretty unhappy.
> 
> Her biggest problem is with kmail.  When she looks at a mail message
> (double click the entry in the message list) is always shows her the
> message structure.  Even worse, the frame showing the structure takes
> up half the window.  She can shrink it to something smaller, but the
> next on she looks at has it back to half the window again.
[snip]

I don't know about KDE 4.5 but under 4.3.2 you find the related radio buttons 
under something like (translated from French)
Configuration/Appearance/Lay Out tab/display message structure section

HTH		Perry

-- 
BOFH excuse #321: Scheduled global CPU outage