Index: doc/user/Makefile
===================================================================
--- doc/user/Makefile	(revision cdc02f28045dea7a293c384abb175ac0c5185dcc)
+++ doc/user/Makefile	(revision 848439f8d6e456a0269c3145cc6faa97e77d4637)
@@ -55,5 +55,5 @@
 
 ${DOCUMENT} : ${BASE}.ps
-	ps2pdf $<
+	ps2pdf -dPDFSETTINGS=/prepress $<
 
 ${BASE}.ps : ${BASE}.dvi