Set right position for Button
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Canvas width="100%" height="100%"> <mx:Button right="10" label="Right Most Button"/> <mx:Button right="10" bottom="10" label="Right Bottom Most Button"/> </mx:Canvas> </mx:Application>