/sys$common/syshlp/TECO.HLB
Commands, D
 *Conan The Librarian 

  The "D" command is used to delete characters from the
  editing buffer.  Common forms of the command are:

      D  Delete the character which follows the pointer
     5D  Delete the next five characters, starting
         with the character following the pointer
    -1D  Delete the character which immediately precedes
         the pointer
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