To temporarily go to a newsgroup named group.bar:

 Prompt                          Type             In order to...
 ======                          ====             ==============
 <menu or show mode>             G                Go to...
 Group of Folder (+./~%=sneNbB)  bar RET          ...next newsgroup with
                                                  `bar' in its name
 foo.bar                         n RET            no, go to next
 group.bar                       y RET            yes, go to this newsgroup
 Number of articles (juasne) (j) <anything but j> temporarily go to group.bar

Here's the meaning of the choices in the last prompt:

 Type  In order to *temporarily* go to...
 ====  ==================================
 u     unread articles
 a     all articles
 s     articles with subject matching what you specify
 n     articles with author matching what you specify
 e     articles with either subject or author matching what you specify

When you temporarily go to a newsgroup:
* The upper right corner will say *NO*UPDATE*
* The lower right corner will say <Level N>.  N is a number that
  tells how far you are from the top level (i.e., the "current"
  underlying group).  E.g., <Level 2> is one away from the top and
  <Level 3> is two away from the top.

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