diff --git a/Doc/paper-a4/pypaper.sty b/Doc/paper-a4/pypaper.sty
index 10b22f8..2415aad 100644
--- a/Doc/paper-a4/pypaper.sty
+++ b/Doc/paper-a4/pypaper.sty
@@ -3,3 +3,15 @@
 %
 \newcommand{\py@paper}{a4paper}
 \newcommand{\py@ptsize}{10pt}
+
+%  These set up the fonts for the documents.
+%
+%  The "times" package makes the default font the PostScript Times
+%  font, which makes for smaller PostScript and a font that more people 
+%  like.
+%
+%  The "avant" package causes the AvantGarde font to be used for
+%  sans-serif text, instead of the uglier Helvetica set up by the "times"
+%  package.
+%
+\RequirePackage{times}\typeout{Using Times instead of Computer Modern.}