gnus: Summary Agent Commands

 
 6.9.3.2 Summary Agent Commands
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 ‘J #’
      Mark the article for downloading (‘gnus-agent-mark-article’).
 
 ‘J M-#’
      Remove the downloading mark from the article
      (‘gnus-agent-unmark-article’).
 
 ‘@’
      Toggle whether to download the article (‘gnus-agent-toggle-mark’).
      The download mark is ‘%’ by default.
 
 ‘J c’
      Mark all articles as read (‘gnus-agent-catchup’) that are neither
      cached, downloaded, nor downloadable.
 
 ‘J S’
      Download all eligible (SeeAgent Categories) articles in this
      group.  (‘gnus-agent-fetch-group’).
 
 ‘J s’
      Download all processable articles in this group.
      (‘gnus-agent-summary-fetch-series’).
 
 ‘J u’
      Download all downloadable articles in the current group
      (‘gnus-agent-summary-fetch-group’).