diff --git a/src/app/composer/qgscomposer.cpp b/src/app/composer/qgscomposer.cpp
index 03d6d537414..1b9f1a027ca 100644
--- a/src/app/composer/qgscomposer.cpp
+++ b/src/app/composer/qgscomposer.cpp
@@ -932,7 +932,7 @@ void QgsComposer::restoreWindowState()
   else
   {
     QList<int> defaultSize;
-    defaultSize << 300 << 100;
+    defaultSize << 300 << 100; // page display 300 pixels, details pane 100 pixels
     mSplitter->setSizes(defaultSize);
   }
 }