term% ls -F
term% pwd
term% cat index.txt
ROFF(1)                     General Commands Manual                    ROFF(1)

       roff  -  format text

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

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

       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 manipu‐
            lation; resume on receipt of an interrupt signal.
       -h   Insert tabs in the output stream to replace spaces whenever appro‐

       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 charac‐
       ter, normally a period.

       Output lines may be filled as nearly as possible with words without re‐
       gard 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 sig‐
       nify 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 appro‐
       priate 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 justi‐
       fied 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 charac‐
       ter, 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 character
       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  ex‐
       tent possible.

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

       Roff  is  the  simplest of the text formatting programs, and is utterly
                               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.