Group Levels
============

   All groups have a level of "subscribedness".  For instance, if a
group is on level 2, it is more subscribed than a group on level 5.  You
can ask Gnus to just list groups on a given level or lower (
see Listing Groups.), or to just check for new articles in groups on a
given level or lower (see Scanning New Messages.).

   Remember:  The higher the level of the group, the less important it
is.

`S l'
     Set the level of the current group.  If a numeric prefix is given,
     the next N groups will have their levels set.  The user will be
     prompted for a level.

   Gnus considers groups on between levels 1 and
`gnus-level-subscribed' (inclusive) (default 5) to be subscribed,
`gnus-level-subscribed' (exclusive) and `gnus-level-unsubscribed'
(inclusive) (default 7) to be unsubscribed, `gnus-level-zombie' to be
zombies (walking dead) (default 8) and `gnus-level-killed' to be killed
(default 9), completely dead.  Gnus treats subscribed and unsubscribed
groups exactly the same, but zombie and killed groups have no
information on what articles you have read, etc, stored.  This
distinction between dead and living groups isn't done because it is
nice or clever, it is done purely for reasons of efficiency.

   It is recommended that you keep all your mail groups (if any) on
quite low levels (eg. 1 or 2).

   If you want to play with the level variables, you should show some
care.  Set them once, and don't touch them ever again.  Better yet,
don't touch them at all unless you know exactly what you're doing.

   Two closely related variables are `gnus-level-default-subscribed'
(default 3) and `gnus-level-default-unsubscribed' (default 6), which
are the levels that new groups will be put on if they are
(un)subscribed.  These two variables should, of course, be inside the
relevant legal ranges.

   If `gnus-keep-same-level' is non-`nil', some movement commands will
only move to groups that are of the same level (or lower).  In
particular, going from the last article in one group to the next group
will go to the next group of the same level (or lower).  This might be
handy if you want to read the most important groups before you read the
rest.

   All groups with a level less than or equal to
`gnus-group-default-list-level' will be listed in the group buffer by
default.

   If `gnus-group-list-inactive-groups' is non-`nil', non-active groups
will be listed along with the unread groups.  This variable is `t' by
default.  If it is `nil', inactive groups won't be listed.

   If `gnus-group-use-permanent-levels' is non-`nil', once you give a
level prefix to `g' or `l', all subsequent commands will use this level
as the "work" level.

   Gnus will normally just activate groups that are on level
`gnus-activate-level' or less.  If you don't want to activate
unsubscribed groups, for instance, you might set this variable to `5'.