diff --git a/data/config.xml b/data/config.xml
index 615f72a..8fc6861 100644
--- a/data/config.xml
+++ b/data/config.xml
@@ -5,12 +5,19 @@
 
 <windowedFullscreen>true</windowedFullscreen>
 
+<!-- Reduce the following parameters if you game runs too slow.
+    If you feel your game runs smooth enough you can increase them to
+    increase the visual quality.  -->
+
 <shadowCubeSize>1024</shadowCubeSize>
 
 <farPlane>150.0</farPlane>
 
 <maxShadowRenderCount>5</maxShadowRenderCount>
 
+<!-- The following stuff is used to configure the application.
+     Do not change unless you know what you are doing. -->
+
 <compositionsPath>data/levels/Compositions.xml</compositionsPath>
 
 <shaderPath>data/shader/</shaderPath>