diff --git a/layout.xml b/layout.xml
index fd773253a8..71e5f571ba 100644
--- a/layout.xml
+++ b/layout.xml
@@ -42,7 +42,7 @@
-
+
diff --git a/properties.xml b/properties.xml
index 52490a2968..3acd3a70fc 100644
--- a/properties.xml
+++ b/properties.xml
@@ -24,9 +24,11 @@
-
+
+ -->
+
+
+
diff --git a/src/documentation/xdocs/book.xml b/src/documentation/xdocs/book.xml
index 1d4b945e38..1ba77670eb 100644
--- a/src/documentation/xdocs/book.xml
+++ b/src/documentation/xdocs/book.xml
@@ -6,30 +6,38 @@
copyright="@year@ Poi Project"
xmlns:xlink="http://www.w3.org/1999/xlink">
-