code: public void showGeometricInfo() {
  		FeatureTransaction ft = getFeatureTransaction();
  		if (infoLabel == null && ft != null && ft.getNewFeatures() != null && ft.getNewFeatures().length > 0) {
  			infoLabel = new GeometricInfoLabel();
  			infoLabel.addClickHandler(new DestroyLabelInfoOnClick());
  			infoLabel.setGeometry(ft.getNewFeatures()[0].getGeometry());
  			infoLabel.animateMove(mapWidget.getWidth() - 155, 10);
  		}
  	}
docs: Show an overview of geometric attributes of the geometry that's being edited.