show all fragments during print

css/print.css

@@ -145,13 +145,16 @@ ul, ol, div, p {
 	    -ms-transform: none;
 	        transform: none;
 }
-section {
+#reveal section {
 	page-break-after: always !important; 
 	display: block !important;
 }
-section.stack {
+#reveal section.stack {
 	page-break-after: avoid !important; 
 }
+#reveal section .fragment {
+	opacity: 1 !important;
+}
 #reveal section img {
 	display: block;
 	margin: 15px 0px;