--- a/src/source/appextend.rst	Fri May 18 11:33:19 2018 +0200
+++ b/src/source/appextend.rst	Wed May 23 14:24:30 2018 +0200
@@ -9,3 +9,4 @@
 
     howto-adapter
     howto-portlet
+    howto-renderer