Info Catalog gnus: Summary Post Commands gnus: Reply Followup and Post gnus: Canceling and Superseding

gnus: Summary Message Commands

 
 3.5.3 Summary Message Commands
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 ‘S y’
      Yank the current article into an already existing Message
      composition buffer (‘gnus-summary-yank-message’).  This command
      prompts for what message buffer you want to yank into, and
      understands the process/prefix convention (Process/Prefix).
 

Info Catalog gnus: Summary Post Commands gnus: Reply Followup and Post gnus: Canceling and Superseding