polyLineAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/lines.png"));
curvesAction = new CreateCurveAction(page);
curvesAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/curves.png"));
markerAction = new CreateMarkerAction(page);
markerAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/bullet_blue.png"));
modifyVerticesAction = new ModifyVerticesAction(page);
modifyVerticesAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/modify_vertices.png"));