--- OLD/ppm/ppmtorgb3.1	Thu Jan  1 00:00:00 1970
+++ NEW/ppm/ppmtorgb3.1	Thu Jan  1 00:00:00 1970
@@ -5,17 +5,23 @@
 .SH SYNOPSIS
 .B ppmtorgb3
 .RI [ ppmfile ]
+.RI [ "r-out g-out b-out" ]
 .SH DESCRIPTION
 Reads a portable pixmap as input.
 Writes three portable graymaps as output, one each for red, green, and blue.
 .IX "color separation"
 .PP
-The output filenames are constructed by taking the input filename,
-stripping off any extension, and appending ".red", ".grn", and ".blu".
+By default, the output filenames are constructed by taking the input
+filename, stripping off any extension, and appending
+".red", ".grn", and ".blu".
 For example, separating lenna.ppm would result in lenna.red, lenna.grn,
 and lenna.blu.
 If the input comes from stdin, the names are noname.red, noname.grn,
 and noname.blu.
+However, three filenames can be explicitly specified, either with or
+without an input filename specified.  (The apparent ambiguity as to
+whether the first arg is ppmfile or r-out is resolved by checking
+whether there are three or four arguments).
 .SH "SEE ALSO"
 rgb3toppm(1), ppmtopgm(1), pgmtoppm(1), ppm(5), pgm(5)
 .SH AUTHOR
@@ -26,3 +32,8 @@
 .\" copyright notice and this permission notice appear in supporting
 .\" documentation.  This software is provided "as is" without express or
 .\" implied warranty.
+.\"
+.\" Hacked on, 2003-06-14, to describe the r-out/g-out/b-out args, with
+.\" matching code added to the source.  All intellectual property
+.\" rights I have in the resulting derivative works I hereby release
+.\" into the public domain.  -Mouse