diff --git a/ws/Docbook/CustomLayer/slide/slideHdm.xsl b/ws/Docbook/CustomLayer/slide/slideHdm.xsl
index fe79732b1760e62d678d66b49b60feef6be6da5c..723bfbb37ec0d0f5d2dcaf66658730772009d8d7 100644
--- a/ws/Docbook/CustomLayer/slide/slideHdm.xsl
+++ b/ws/Docbook/CustomLayer/slide/slideHdm.xsl
@@ -51,7 +51,7 @@
           </title>
           <link href="common/css/positioning.css" rel="stylesheet" />
           <link href="reveal.js/css/reveal.css" rel="stylesheet" />
-          <link href="reveal.js/css/theme/solarized.css" id="theme" rel="stylesheet" />
+          <link href="reveal.js/css/theme/serif.css" id="theme" rel="stylesheet" />
           
           <!-- Code syntax highlighting -->
           <link href="reveal.js/lib/css/zenburn.css" rel="stylesheet" />
@@ -79,7 +79,7 @@
             width: '70%',
 	          margin: 0.0,
             
-            transition: 'slide', // none/fade/slide/convex/concave/zoom
+            transition: 'convex', // none/fade/slide/convex/concave/zoom
             
             math: {
             mathjax: 'mathjax/MathJax.js',