Index: /CKEditor/trunk/_source/plugins/panel/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/panel/plugin.js	(revision 7247)
+++ /CKEditor/trunk/_source/plugins/panel/plugin.js	(revision 7248)
@@ -137,4 +137,11 @@
 					langCode = parentDiv.getParent().getAttribute( 'lang' ),
 					doc = iframe.getFrameDocument();
+
+				// Make it scrollable on iOS. (#8308)
+				CKEDITOR.env.iOS && parentDiv.setStyles(
+					{
+						'overflow' : 'scroll',
+						'-webkit-overflow-scrolling' : 'touch'
+					});
 
 				var onLoad = CKEDITOR.tools.addFunction( CKEDITOR.tools.bind( function( ev )