gnus: Really Various Summary Commands

 
 3.27.4 Really Various Summary Commands
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 ‘A D’
 ‘C-d’
      If the current article is a collection of other articles (for
      instance, a digest), you might use this command to enter a group
      based on the that article (‘gnus-summary-enter-digest-group’).
      Gnus will try to guess what article type is currently displayed
      unless you give a prefix to this command, which forces a “digest”
      interpretation.  Basically, whenever you see a message that is a
      collection of other messages of some format, you ‘C-d’ and read
      these messages in a more convenient fashion.
 
      The variable ‘gnus-auto-select-on-ephemeral-exit’ controls what
      article should be selected after exiting a digest group.  Valid
      values include:
 
      ‘next’
           Select the next article.
 
      ‘next-unread’
           Select the next unread article.
 
      ‘next-noselect’
           Move the cursor to the next article.  This is the default.
 
      ‘next-unread-noselect’
           Move the cursor to the next unread article.
 
      If it has any other value or there is no next (unread) article, the
      article selected before entering to the digest group will appear.
 
 ‘C-M-d’
      This command is very similar to the one above, but lets you gather
      several documents into one biiig group
      (‘gnus-summary-read-document’).  It does this by opening several
      ‘nndoc’ groups for each document, and then opening an ‘nnvirtual’
      group on top of these ‘nndoc’ groups.  This command understands the
      process/prefix convention (SeeProcess/Prefix).
 
 ‘C-t’
      Toggle truncation of summary lines
      (‘gnus-summary-toggle-truncation’).  This will probably confuse the
      line centering function in the summary buffer, so it’s not a good
      idea to have truncation switched off while reading articles.
 
 ‘=’
      Expand the summary buffer window (‘gnus-summary-expand-window’).
      If given a prefix, force an ‘article’ window configuration.
 
 ‘C-M-e’
      Edit the group parameters (SeeGroup Parameters) of the current
      group (‘gnus-summary-edit-parameters’).
 
 ‘C-M-a’
      Customize the group parameters (SeeGroup Parameters) of the
      current group (‘gnus-summary-customize-parameters’).