I am sorry you are having so much trouble. Somehow I suspect it is
due to the different way all the newsreaders you are testing work.
Xananews is probably not so intuitive to you since using Xnews. Xnews
was very confusing to me and I dropped it in favor of Xananews.
If you are asking about the headers in the Message Tree Pane, you
should be able to click on the first message and the entire thread
opens up. Of course you must set up the options properly, like this:
http://img423.imageshack.us/my.php?image=xn5nu.jpg
Also, I forgot to mention the strongest points of Xananews. Batches,
keyboard shortcuts, and coloring of threads in the Message Tree.
Batches allow you to set up default actions for different newsgroups on
the same server or on a different servers. For instance , I can set up
a batch where it gets all messages on two groups from one server and
messages from three groups on a another server.
Keyboard shortcuts allow me to customize keyboard combinations or
single keys to do a particular action such as "mark all messages read",
"find next unread reply to me", "perform default action" for that group
or server, etc. There are a myriad of keyboard combinations available
for your use.
And last but not least, you can set up a color of your choice for
threads you have participated in, threads that have replies to you,
colors for certain users, etc.
All options are available through a GUI that does not require messing
with .ini files. The author has a forum that he participates in
regularly and there are many who will answer your questions there also.
I have only begun to tell you of its fantastic capabilities.