[Last major changes 3/28/93]
[Minor editing September 1, 1993]
Article scan mode introduction.

	When you start strn, not much will be different.  Typing 'v'
at the newsgroup prompt will give an updated version text.  Let's
plunge right in--go to a newsgroup with several articles and type ';'
(the semicolon key).  (You may want to choose one you don't care about
too much for your initial exploration since it is possible to delete
articles easily.)  You can type the semicolon from almost any
mode: try it from the newsgroup or article level this time.

	Once you type semicolon, some text will scroll by quickly
and will be replaced with the article scan interface.  Now you
can learn the most important command: 'h' for help.  Once you type it
you will see all the commands for the strn interface.  There are quite
a few of them, but most of them are very similar to the trn thread
selector.  Try playing with some of them ('#', 'a' and TAB are
recommended, although TAB may take awhile in large newsgroups)

	Now you can try reading an article.  Move the pointer (with
'n' and 'p') to an article that looks interesting, and press the SPACE
bar.  You will now read that article, and followups to that article,
then will be returned to article scan mode.  At any time you can type
';' to go back to article scan mode.

	Marking articles as a group is one of the most useful features
of strn.  To do this, move the pointer to each article you wish to
read, then type 'm' to "M"ark it for reading.  (The status display for
that article will change.)  After marking several articles, type the
SPACE bar and you will start reading the first marked article, then
followups to the first marked one, then the second marked article, its
followups, and so on.  This is where the "follow" feature can come in
handy.  Suppose you want to read the marked articles, but generally
don't care to read the followups?  Then you can turn the "follow" mode
off by typing 'f' (the text "follow" on the top status bar will
disappear).  With follow off, you will read one marked article after
another, and will return to article scan mode when all the marked
articles are read.  If you see an article and would like to read its
followups, simply type an explicit command to follow the thread (such
as ^N or ']').  You will then follow the thread until it is completed.

	One useful feature is the ability to choose articles out of
trn threads.  This can be especially useful in large thread trees with
several uninteresting subjects.  To do this, go to trn's thread
selector (use '+') and select one or more threads in the usual way.
Then type ';' to go to article scan mode (this might take a few
seconds in some situations).  spinning cursor for a moment then you
will be in article scan mode.  Only the articles in the selected
threads will be displayed.  What happened is that the articles in the
threads were "selected", and you are now in "zoom" mode (which means
that only selected articles are displayed).  (You can experiment with
the 's', 'S', 'z', and 'Z' to see what happens in zoom mode--no
articles will be junked by those keys.)

	The article scan mode has threading independent of trn
threading.  These threads are currently only subject threads (like
many other newsreaders).  The easiest way to see these in action is to
type 'F' (capital F) for "Fold" mode (the top status bar will change).
Now only the first article with the same subject will be displayed.
Commands like ',' will now operate on the entire subject thread.  The
TAB key will give you a count of the # of articles with the same
subject (this article and its followups with the same subject).

Miscellaneous topics:  [move to a separate file?]

VI-style movement:
	Many users use the "vi" editor and have become used to its
up/down movement keys ('k' for up and 'j' for down).  Strn has a
configuration flag to allow these keys to be used in any scan mode.

Typeahead:
	Article scan mode allows "typeahead"--that is, some commands may
be typed before the previous command was finished executing.  This
was done to allow macros to work properly, especially the automatic
macros for the arrow keys.  Sometimes strn will take several seconds
to execute a command, especially if the system is slow.

First articles and the beginning of threads:
	In article scan mode, the first article in a subject-thread
is often not the root of its trn thread tree.  This occurs because
article scan uses the article numbers and trn uses the article's
posting date.

Differences between "marking" and "selecting":
	The two concepts "marking" and "selecting" are very different,
but the difference might not be obvious to all users.  "Marking" is
used to make a group of articles to act on (read/keep/delete).
"Selection" is used to control which articles to display in "zoom"
mode.  A "marked" article will have an "x" character in the last (5th)
status column, and a "selected" article will have a "+" character in
the next-to-last (4th) status column.

Confusion expected about "follow" and "zoom" modes?
	Many users may be confused about the the "follow" and "zoom"
modes.  Better documentation will be written for these modes eventually.
The "follow" mode can be especially confusing--suggestions for its
documentation will be gratefully received.
