Here you go, i think this is it :) if so, always pay attention to the absolute and vertical layout of the components
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" verticalGap="0" paddingTop="0" paddingBottom="0" width="600" height="600"> <mx:Panel height="70%"> <mx:Text text="This panel should take up 75% of the application's height" /> </mx:Panel> <mx:Panel id="my25panel" height="30%" layout="absolute" title="{100/(this.height/my25panel.height)}" width="100%" verticalScrollPolicy="off" horizontalScrollPolicy="off"> <mx:Accordion height="100%" width="100%" > <mx:Canvas verticalScrollPolicy="on" height="100%" width="100%"> <mx:VBox verticalScrollPolicy="off" height="100%" width="100%"> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> </mx:VBox> </mx:Canvas> <mx:Canvas verticalScrollPolicy="on" height="100%" width="100%"> <mx:VBox verticalScrollPolicy="off" height="100%" width="100%"> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> </mx:VBox> </mx:Canvas> <mx:Canvas verticalScrollPolicy="on" height="100%" width="100%"> <mx:VBox verticalScrollPolicy="off" height="100%" width="100%"> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> <mx:TextInput/> </mx:VBox> </mx:Canvas> </mx:Accordion> </mx:Panel> </mx:Application>

