A Canvas container with two vertical regions and two horizontal regions
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Canvas> <mx:constraintColumns> <mx:ConstraintColumn id="col1" width="212" /> <mx:ConstraintColumn id="col2" width="100%" /> </mx:constraintColumns> <mx:constraintRows> <mx:ConstraintRow id="row1" height="80%" /> <mx:ConstraintRow id="row2" height="20%" /> </mx:constraintRows> </mx:Canvas> </mx:Application>