.TH PSI 1
.SH NAME
psi \- postscript interpreter
.SH SYNOPSIS
.B psi
[
.I option ...
] [
.I file
]
.SH DESCRIPTION
.I Psi
reads postscript input from
.I file
or from standard input
and simulates the resulting pages in an
.IR 8½ (1)
window.
The options are
.TP \w'-a\ x\ yXX'u
.BI -p n
Display page
.I n.
.TP
.B -r
Display the image at full scale, with the bottom left
corner positioned at the bottom left corner of the window.
(By default, the image is scaled to fit the window, maintaining
the aspect ratio of a printer.)
.TP
.BI -a " x y"
Display the image at full scale with position
.I x,y
of the image placed at the bottom left corner of the window.
.PP
Fonts are implemented with size-24 bitmap fonts.
Available fonts are
Symbol, Times-Roman, Times-Italic, Times-Bold, Helvetica,
Helvetica-Oblique, Helvetica-Bold.
.PP
When the `cherries' icon is displayed, use mouse button 3
to move forward
.RB ( more )
or quit 
.RB ( done ).
Button 2 exits the program completely.
.SH EXAMPLE
.IP
.EX
troff -ms memo | lp -dstdout -H | psi
.EE
.PP
Format a memo, convert it to postscript,
and display it.
.SH FILES
.TF psi.err
.TP
.B psi.err
error messages
.SH SEE ALSO
.IR lp (1),
.IR proof (1)
.SH DIAGNOSTICS
Error comments are placed on file
.BR psi.err .
.PP
Symbols that lack bitmaps are replaced by `?'
and an error is reported.
.SH BUGS
Unimplemented postscript features are rotated images or imagemasks,
half tone screens, multiple path clipping, and charpath.
