glenda.party
term% ls -F
term% pwd
$home/manuals/9front/1/proof
term% cat index.txt
PROOF(1)                    General Commands Manual                   PROOF(1)



NAME
       proof - troff output interpreter

SYNOPSIS
       proof [ -mmag ] [ -/nview ] [ -F dir ] [ -d ] [ file ]

DESCRIPTION
       Proof  reads troff(1) intermediate language from file or standard input
       and simulates the resulting pages on the screen.

       After a page of text is displayed, proof pauses for a command from  the
       keyboard.  The typed commands are:

       newline   Go on to next page of text.

       -         Go back to the previous page.

       q         Quit.

       pn        Print  page  n.   An  out-of-bounds page number means the end
                 nearer to that number; a missing  number  means  the  current
                 page; a signed number means an offset to the current page.

       n         Same as pn.

       c         Clear the screen, then wait for another command.

       mmag      Change  the  magnification  at  which  the output is printed.
                 Normally it is printed with magnification .9; mag=.5  shrinks
                 it to half size; mag=2 doubles the size.

       xval      Move  everything val screen pixels to the right (left, if val
                 is negative).

       yval      Move everything val screen pixels down (up, if val  is  nega‐
                 tive).

       /nview    Split  the  window  into nview pieces.  The current page goes
                 into the rightmost, bottommost piece, and previous pages  are
                 shown in the other pieces.

       -F dir    Use dir for fonts instead of /lib/font/bit.

       d         Toggle the debug flag.

       These  commands are also available, under slightly different form, from
       a menu on button 3.  The pan menu item allows arbitrary positioning  of
       the page: after selecting pan, press the mouse button again and hold it
       down while moving the page to the desired location.  The page  will  be
       redisplayed  in its entirety when the button is released.  Mouse button
       1 also pans, without the need for selecting from a menu.

       The m, x, y, F, /, and d commands are also available  as  command  line
       options.

FILES
       /lib/font/bit/*
              fonts

       /lib/font/bit/MAP
              how  to  convert  troff  output  fonts  and character names into
              screen fonts and character numbers

SOURCE
       /sys/src/cmd/proof

SEE ALSO
       lp(1), gs(1), page(1)
       J. F. Ossanna and B. W. Kernighan, ``Troff User's Manual''



                                                                      PROOF(1)