{
  TPaveText *pt = new TPaveText(0.5,0.5,0.6,0.6);
  pt->AddText("Hello");
  pt->Draw();
  cout << pt->GetX1NDC() << " " <<  pt->GetY1NDC() << " " << pt->GetX2NDC() << " " <<  pt->GetY2NDC() << endl;
}