plan9 man page for proof

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 negative).

       /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.

       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)
       J. F. Ossanna and B. W. Kernighan, ``Troff User's Manual''

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