void pl_eff_XY(Int_t iMode = 0) {
  //  TCanvas *can = new TCanvas("can22","can22");
  //  can->Divide(2,2);
  //  TCanvas *can = new TCanvas("can","can",48,55,700,900);
  TCanvas* can = new TCanvas("can", "can", 0, 0, 800, 800);
  can->Divide(3, 3, 0.01, 0.01);
  //  can->Divide(2,2,0,0);
  Float_t lsize = 0.03;

  gROOT->cd();
  gPad->SetFillColor(0);
  gStyle->SetPalette(1);
  gStyle->SetLabelSize(lsize);

  gStyle->SetOptStat(kFALSE);
  //gROOT->cd();
  //gROOT->SetDirLevel(2);

  TH1* h;
  TH2* h2;

  TH2* hs4;
  TH2* hsS;
  TH2* hs0;

  TH2* heff4;
  TH2* heffS;
  TH2* heff0;

  Double_t Npredicted = 0;
  Double_t Nfound     = 0.;
  TString hname       = "";

  can->cd(1);
  gROOT->cd();
  hname = Form("hXY4D4sel");
  hs4   = (TH2*) gROOT->FindObjectAny(hname);
  if (hs4 != NULL) {
    hs4->UseCurrentStyle();
    hs4->GetYaxis()->SetLabelSize(lsize);
    hs4->Draw("colz");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(2);
  gROOT->cd();
  hname = Form("hXYSel2D4sel");
  hsS   = (TH2*) gROOT->FindObjectAny(hname);
  if (hsS != NULL) {
    hsS->UseCurrentStyle();
    hsS->GetYaxis()->SetLabelSize(lsize);
    hsS->Draw("colz");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(3);
  gROOT->cd();
  hname = Form("hXY0D4sel");
  hs0   = (TH2*) gROOT->FindObjectAny(hname);
  if (hs0 != NULL) {
    hs0->UseCurrentStyle();
    hs0->GetYaxis()->SetLabelSize(lsize);
    hs0->Draw("colz");
    Npredicted = hs0->GetEntries();
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(4);
  gROOT->cd();
  hname = Form("hXY4D4best");
  h2    = (TH2*) gROOT->FindObjectAny(hname);
  if (h2 != NULL) {
    h2->UseCurrentStyle();
    h2->GetYaxis()->SetLabelSize(lsize);
    h2->Draw("colz");
    heff4 = (TH2*) h2->Clone();
    heff4->SetName("hXEffRef");
    heff4->SetTitle("Selection efficiency on reference counter");
    heff4->Divide(h2, hs4, 1., 1., "B");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(5);
  gROOT->cd();
  hname = Form("hXYSel2D4best");
  h2    = (TH2*) gROOT->FindObjectAny(hname);
  if (h2 != NULL) {
    h2->UseCurrentStyle();
    h2->GetYaxis()->SetLabelSize(lsize);
    h2->Draw("colz");
    heffS = (TH2*) h2->Clone();
    heffS->SetName("hXYEffSel2");
    heffS->SetTitle("Selection efficiency on Sel2 counter");
    heffS->Divide(h2, hsS, 1., 1., "B");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(6);
  gROOT->cd();
  hname = Form("hXY0D4best");
  h2    = (TH2*) gROOT->FindObjectAny(hname);
  if (h2 != NULL) {
    h2->UseCurrentStyle();
    h2->GetYaxis()->SetLabelSize(lsize);
    h2->Draw("colz");
    Nfound = h2->GetEntries();
    heff0  = (TH2*) h2->Clone();
    heff0->SetName("hXYEffDut");
    heff0->SetTitle("Efficiency of Dut counter");
    heff0->Divide(h2, hs0, 1., 1., "B");
    Double_t dEff = Nfound / Npredicted * 100.;
    cout << "Integral Efficiency: " << Form("%3.1f", dEff) << " % " << endl;

  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(7);
  if (heff4 != NULL) {
    heff4->UseCurrentStyle();
    heff4->GetYaxis()->SetLabelSize(lsize);
    heff4->Draw("colz");
    heff4->SetMaximum(1.5);
    heff4->GetZaxis()->SetRangeUser(0.5, 1.5);
    can->Update();
    heff4->Draw("colz");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(8);
  if (heffS != NULL) {
    heffS->UseCurrentStyle();
    heffS->GetYaxis()->SetLabelSize(lsize);
    heffS->Draw("colz");
    heffS->SetMaximum(1.5);
    heffS->GetZaxis()->SetRangeUser(0.5, 1.5);
    heffS->Draw("colz");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->cd(9);
  if (heff0 != NULL) {
    heff0->Draw("colz");
    heff0->SetMaximum(1.5);
    heff0->GetZaxis()->SetRangeUser(0.5, 1.5);
    heff0->UseCurrentStyle();
    heff0->GetYaxis()->SetLabelSize(lsize);
    heff0->Draw("colz");
  } else {
    cout << "Histogram " << hname << " not existing. " << endl;
  }

  can->SaveAs("pl_eff_XY.pdf");
}