diff --git a/make-includes/build_content_rules.make b/make-includes/build_content_rules.make
index 279e2bf..5925282 100755
--- a/make-includes/build_content_rules.make
+++ b/make-includes/build_content_rules.make
@@ -45,15 +45,18 @@
 
 ################################################################################
 #
-# Paths. All original graphics should normally be in ./graphics/source,
-# and derived versions should normally be placed in ./graphics. If you
-# want something different, write your own rules, you deviant!
+# Paths. All original graphics should normally be in ./graphics (where .
+# represents the current content directory), and derived versions should
+# normally be placed in $(BUILD_DIR). If you want something different,
+# write your own rules, you deviant!
 #
 vpath %-web.png $(BUILD_DIR)
 vpath %-web-zoom.png $(BUILD_DIR)
 # vpath %-web-hires.png $(BUILD_DIR)
 vpath %-print.pdf $(BUILD_DIR)
 vpath %.eps graphics
+vpath %-print.png $(BUILD_DIR)
+vpath %.png graphics
 
 
 ################################################################################
@@ -129,6 +132,25 @@
 
 ################################################################################
 #
+# Some graphics start out as bitmaps (e.g., screenshots) and will
+# therefore not have an EPS version. We assume that the source for such
+# images is a PNG file instead. We don't need to generate anything; rather
+# we just copy the original file to the build directory, because we're
+# using PNG for the web version anyway, and PDFLaTeX supports PNG
+# natively.
+#
+%-print.png: %.png
+	@announce "Generating $@ (print)"
+	@cp $< $(BUILD_DIR)/$@
+
+%-web.png: %.png
+	@announce "Generating $@ (web)"
+	@cp $< $(BUILD_DIR)/$@
+
+
+
+################################################################################
+#
 # Clean up. These targets are probably no longer needed, as the build
 # versions are now generated in the build directory. There should
 # consequently be no extraneous files floating around in the content