diff --git a/slides/index.html b/slides/index.html
index 32f5533515f5f670b4c07fd98ea9b81eef0b693a..19a48b55dcf24d206b55fcd7350178071030b8f1 100644
--- a/slides/index.html
+++ b/slides/index.html
@@ -232,6 +232,14 @@
 				    pathSize: 2, // (optional) path size in px, default 4
 				  }
 			});
+			window.addEventListener("mousedown", handleClick, false);
+			window.addEventListener("contextmenu", function(e) { e.preventDefault(); }, false);
+
+			function handleClick(e) {
+				e.preventDefault();
+				if(e.button === 0) Reveal.next(); 
+				if(e.button === 2) Reveal.prev(); 
+}
 		</script>
 	</body>
 </html>
diff --git a/slides/otb.css b/slides/otb.css
index 82bfcd0c06a56dac44b39d4e3fdec6abb844c0a2..f2416747d4c616511c6607c0a7f9093cfd87e42b 100644
--- a/slides/otb.css
+++ b/slides/otb.css
@@ -211,7 +211,7 @@ y {
 
 .reveal pre code {
   display: block;
-  font-size: 1.15em;
+  font-size: 1.35em;
   background: #FFFFFF;
   padding: 5px;
   overflow: auto;