v7 man page for roff

ROFF(1) 						      General Commands Manual							   ROFF(1)

NAME
       roff  -	format text

SYNOPSIS
       roff [ +n ] [ -n ] [ -s ] [ -h ] file ...

       nroff -mr [ option ] ... file ...
       troff -mr [ option ] ... file ...

DESCRIPTION
       Roff formats text according to control lines embedded in the text in the given files.  Encountering a nonexistent file terminates printing.
       Incoming inter-terminal messages are turned off during printing.  The optional flag arguments mean:
       +n   Start printing at the first page with number n.
       -n   Stop printing at the first page numbered higher than n.
       -s   Stop before each page (including the first) to allow paper manipulation; resume on receipt of an interrupt signal.
       -h   Insert tabs in the output stream to replace spaces whenever appropriate.

       Input consists of intermixed text lines, which contain information to be formatted, and request lines, which contain instructions about how
       to format it.  Request lines begin with a distinguished control character, normally a period.

       Output  lines  may  be  filled  as nearly as possible with words without regard to input lineation.  Line breaks may be caused at specified
       places by certain commands, or by the appearance of an empty input line or an input line beginning with a space.

       The capabilities of roff are specified in the attached Request Summary.	Numerical values are denoted there by n or +n, titles  by  t,  and
       single characters by c.	Numbers denoted +n may be signed + or -, in which case they signify relative changes to a quantity, otherwise they
       signify an absolute resetting.  Missing n fields are ordinarily taken to be 1, missing t fields to be empty, and c fields to shut  off  the
       appropriate special interpretation.

       Running titles usually appear at top and bottom of every page.  They are set by requests like

		 .he 'part1'part2'part3'

       Part1  is  left	justified,  part2 is centered, and part3 is right justified on the page.  Any % sign in a title is replaced by the current
       page number.  Any nonblank may serve as a quote.

       ASCII tab characters are replaced in the input by a replacement character, normally a space, according to the column settings  given  by  a
       .ta command.  (See .tr for how to convert this character on output.)

       Automatic hyphenation of filled output is done under control of .hy.  When a word contains a designated hyphenation character, that charac-
       ter disappears from the output and hyphens can be introduced into the word at the marked places only.

       The -mr option of nroff or troff(1) simulates roff to the greatest extent possible.

FILES
       /usr/lib/suftab	   suffix hyphenation tables
       /tmp/rtm? temporary

BUGS
       Roff is the simplest of the text formatting programs, and is utterly frozen.
								 REQUEST SUMMARY

Request    Break Initial Meaning
the current line is stopped.
without filling.
to be invoked by request `.xx' (definition ends on line beginning `..').
and is not done, if n=0.

																	   ROFF(1)