static Canvas showCAL_2(CirclesAndLines oldCAL, CirclesAndLines newCAL, Canvas canvas) {
  if (canvas == null) ret newCAL.show();
  copyCAL(newCAL, oldCAL);
  canvas.update();
  //titleStatus2(canvas, join(" - ", newCAL.globalID, unnull(newCAL.title)));
  ret canvas;
}