*********************** Table of Commands *********************

 Command       Break?    Default stacked Function
 -------       ------    ------- ------- ---------

A. nroff-compatible commands (* denotes compatibility limitation)
   --------------------------------------------------------------

 .. string       no                      string is "mere" comment
                                         (or end of macro definition)

 .ad             no      initially on    turn right justification 
                                         on (use .na to turn off); 
                                         only applicable if 
                                         "filling" is also on.

 .bp n           yes     n =  +1         begin page numbered n

 .br             yes                     cause a break (this
                                         line is not justified)

 .ce n           yes     n = 1           center next n lines

 .di name (*)    no      JUNK.$$$        diversion file
                                         (see "PREPROCESSOR")
 
 .de name        no                      define (multiline)
                                         macro ("PREPROCESSOR")

 .ds /../../../  no      null string     define string replace-
                                          ment ("PREPROCESSOR")

 .ed (*)         no                      end diversion
                                         (see "PREPROCESSOR")

 .em                                     end macro
                                         (see "PREPROCESSOR")

 .ex             no                      immediate abort back to
                                         system

 .fi             yes                     start filling lines

 .ig string      no                      "ignore" string(see ..)

 .in n           no      n = 10  Yes     set indent value to n

 .ll n           no      n = 70  Yes     sets line length (right 
                                         margin) to n

 .ls n           no      n = 1   Yes     set line spacing to n

 .na             no      initially on    turn right justification 
                                         off (use .ad to turn on)

 .ne n           no/yes  n = 2           "need" n lines; if have
                                         them no action; else
                                         begins new page

 .nf             yes                     stop filling lines

 .nr name n      no      n=0     No      create or modify 
                                         register variable
                                         (see "PREPROCESSOR")

 .pl n           no      n = 66  Yes     sets page length to n

 .pm             no                      prints currently defined
                                         macros

 .so filename    no      ignored Yes     reads named file into
                                         input stream; cannot be
                                         invoked from keyboard
                                         input.

 .sp n           yes     n = 1           space down n lines

 .ta n           no      n = 8   Yes     sets value of tab space

 .tc c           no      ~       Yes     set translation flag
                                         character, see .tr

 .ti n           yes     n = 0           set temp. indent of n

 .tm string                              send message to terminal 
                                         (console); like a comment
                                         but displayed to
                                         operator during run.


B. non-nroff-compatible commands (must be upper-case)
   --------------------------------------------------

 .BJ             yes                     break with right
                                         justification (current
                                         line only)

 .CF c           no      c = '^' Yes     to be used as a prefix
                                         to a character that
                                         controls print func-
                                         tions such as ^+,^-
                                         might be used to
                                         bracket superscripts,
                                         somewhat like
                                         WORDSTAR(TM).

 .DB n           no      n = 0(NO)       set debug flag 1 for
                                         diagnostics

 .EF /../../../  no      blanks          even footer titling

 .EH /../../../  no      blanks          even header titling

 .FF n           no      n = 1(yes)      initially, formfeeds
                                         are "off". Can turn
                                         them on.  Each page
                                         then terminated with
                                         one formfeed.

 .FO /../../../  no      empty           sets both even and odd
                                         page footers

 .HE /../../../  no      empty           sets both even and odd
                                         page headers

 .IC c           no      c = '\' Yes?    to specify the char-
                                         acter used for macro
                                         preprocessing to denote
                                         the token that follows.

 .M1             no      n = 2   Yes     set topmost margin to n

 .M2             no      n = 2   Yes     set 2nd top margin to n
                                         lines

 .M3             no      n = 2   Yes     1st bottom margin to n
                                         lines

 .M4             no      n = 2   Yes     bottom-most margin to n
                                         lines

 .OF /../../../  no      empty           odd page footer title

 .OH /../../../  no      empty           odd page header title

 .OW             no      n = 80          sets output width for
                                         header and footer title

 .SC c           no      blank   Yes     space character; the
                                         visible character
                                         that will be trans-
                                         literated to unexpanded
                                         blank.

 .ST n           no      n=1(yes)        stop(pause)at each page
                                         start; initially off;
                                         may also be enabled by
                                         the -s option.

  -------------------------------------------------------------