Index: /CKEditor/trunk/_source/core/config.js
===================================================================
--- /CKEditor/trunk/_source/core/config.js	(revision 4325)
+++ /CKEditor/trunk/_source/core/config.js	(revision 4326)
@@ -179,5 +179,6 @@
 
 	/**
-	 * The height of editing area( content ), in relative or pixel integer.
+	 * The height of editing area( content ), in relative or absolute, e.g. 30px, 5em.
+	 * Note: Percentage unit is not supported yet. e.g. 30%.
 	 * @type Number|String
 	 * @default '200'