Overlays one image onto another image.
overlayImage(image1: <#Variable#>, image2: <#Variable#>, editor: <#Boolean#>, height: <#String (Allows Variables)#>, width: <#String (Allows Variables)#>, position: <#Type (WFImagePosition)#>, opacity: <#String (Allows Variables)#>, rotation: <#String (Allows Variables)#>)
overlayImage(image1: Profile Image, image2: Background, editor: false, height: "512", width: "512", position: Center, opacity: "1.0", rotation: "180")