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Subcommands

Subcommands  are  a   variety   of   arguments   used   chiefly   with
DIRECTORY-class  (DIRECTORY,  FDIRECTORY,  TDIRECTORY, and VDIRECTORY)
commands and with the BUILD command.  If you want to give  subcommands
to any of the DIRECTORY-class commands, type a comma at the end of the
command line just before pressing  the  carriage  return.   After  the
system   prompts   you  with  a  double  at sign  (@@)  you  can  give
subcommands, one on each line.  If you  give  no  subcommands  to  the
DIRECTORY command, the ALPHABETICAL and HEADING subcommands will be in
effect,  giving  an  alphabetical  listing  of  files.   For   a   few
subcommands,  default  arguments  will  be  in  effect if you give the
subcommands without supplying any.  You can give  subcommands  in  any
order,  requesting  or declining special categories of information and
specifying the format of  its  presentation.   If  you  give  mutually
exclusive  subcommands  (ALPHABETICAL  and CHRONOLOGICAL, for example)
the  last-given  subcommand  prevails.   Note  that  the   FDIRECTORY,
TDIRECTORY,  and  VDIRECTORY  commands are equivalent to the DIRECTORY
command with certain subcommands automatically included,  and  can  be
further  modified  with  other  subcommands from DIRECTORY's list.  To
cancel a DIRECTORY-class command  while  giving  subcommands,  type  a
CTRL/C.

The BUILD command operates differently from  DIRECTORY-class  commands
in  putting you automatically into subcommand mode without your typing
a final  comma  on  the  command  line,  and  in  offering  a  special
subcommand to cancel the command while you are typing subcommands.

See the individual command help files for  more  detailed  information
about subcommands.