Using the Zoom effect to make the button zoom-in large
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white"> <mx:Zoom zoomWidthFrom="0" zoomHeightFrom="0" id="myEffect" /> <mx:Button label="Click on me" mouseDownEffect="{myEffect}" /> </mx:Application>