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+.TH POSTREVERSE 1
+.SH NAME
+.B postreverse
+\- reverse the page order in a PostScript file
+.SH SYNOPSIS
+\*(mBpostreverse\f1
+.OP "" options []
+.OP "" file []
+.SH DESCRIPTION
+.B postreverse
+reverses the page order in files that conform to Adobe's
+Version 1.0 or Version 2.0 PostScript file structuring conventions,
+and writes the results on the standard output.
+Only one input
+.I file
+is allowed and if no
+.I file
+is specified, the standard input is read.
+The following
+.I options
+are understood:
+.TP  0.75i
+.OP \-o list
+Select pages whose numbers are given in the comma-separated
+.IR list .
+The list contains single numbers
+.I N
+and ranges
+.IR N1\-\|N2 .
+A missing
+.I N1
+means the lowest numbered page, a missing
+.I N2
+means the highest.
+.TP 
+.OP \-r
+Do not reverse the pages in
+.IR file .
+.TP 
+.OP \-T dir
+Use
+.I dir
+as the temporary file directory when
+reading from the standard input.
+By default
+.I dir
+is set to
+.MR /tmp .
+.PP
+.B postreverse
+can handle a limited class of files
+that violate page independence,
+provided all global definitions are bracketed by
+.MW %%BeginGlobal
+and
+.MW %%EndGlobal
+comments.
+In addition, files that mark the end of each page with
+.MW "%%EndPage:\ label\ ordinal"
+comments will also reverse properly, provided the prologue and
+trailer sections can be located.
+If
+.B postreverse
+fails to find an
+.MW %%EndProlog
+or
+.MW %%EndSetup
+comment the entire
+.I file
+is copied, unmodified, to the standard output.
+.PP
+Since global definitions are pulled out of individual
+pages and put in the prologue, the output file can be
+minimally conforming, even if the input
+.I file
+was not.
+.SH EXAMPLES
+Select pages 1 to 100 from
+.I file
+and reverse the pages:
+.EX
+postreverse -o1-100 \f2file
+.EE
+Print four logical pages on each physical page
+and reverse all the pages:
+.EX
+postprint -n4 \f2file\fP | postreverse
+.EE
+Produce a minimally conforming file from output
+generated by dpost without reversing the pages:
+.EX
+dpost \f2file\fP | postreverse -r
+.EE
+.SH DIAGNOSTICS
+A 0 exit status is returned if
+.I file
+was successfully processed.
+.SH BUGS
+No attempt has been made to deal with redefinitions of global
+variables or procedures.
+If standard input is used, the input
+.I file
+will be read three times before being reversed.
+.SH SEE ALSO
+.BR dpost (1),
+.BR postdaisy(1),
+.BR postdmd(1),
+.BR postio(1),
+.BR postmd(1),
+.BR postprint(1),
+.BR posttek(1),
+.BR psencoding (1)