Description: Clarify units in paps man page
Bug-Debian: http://bugs.debian.org/365820

--- a/src/paps.1
+++ b/src/paps.1
@@ -43,17 +43,20 @@
 .B \-\-paper ps
 Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.
 .TP
+.B Postscript points
+Each postscript point equals to 1/72 of an inch. 36 points are 1/2 of an inch.
+.TP
 .B \-\-bottom-margin=bm
-Set bottom margin in postscript points (1/72 inch). Default is 36.
+Set bottom margin. Default is 36 postscript points.
 .TP
 .B \-\-top-margin=tm
-Set top margin. Default is 36.
+Set top margin. Default is 36 postscript points.
 .TP
 .B \-\-left-margin=lm
-Set left margin. Default is 36.
+Set left margin. Default is 36 postscript points.
 .TP
 .B \-\-right-margin=rm
-Set right margin. Default is 36.
+Set right margin. Default is 36 postscript points.
 .TP
 .B \-\-help
 Show summary of options.