{
  gROOT->Reset();
  gStyle->SetPalette(1);

  TH2F*    h     = new TH2F("h2","hist title",20,-4,4, 20, -5, 5);
  TF2*     f     = new TF2("f2","xgaus(0)*ygaus(3) + xgaus(6)*ygaus(9) + xgaus(12)*ygaus(15)");
  Double_t p[18] = { 1.5, 3, 0.5,
		     1.5, 3, 1,
		     2, 1, 2,
		     1.5, 0, 1.5,
		     1.5, -2, 0.1,
		     1.5, -2, 0.8 };
  f->SetParameters(p);
  h->FillRandom("f2",2000000);
  h->SetFillColor(kRed);
  //  h->SetMarkerStyle(29);

  // Set all the canvas styles:
  TString    styles[]{"BOX","COLZ","CONT1","ARR","SCAT","SURF3"};
  int        n{6};
  TCanvas    c1("c1","draw styles", 0, 0, 1000,800);
  c1.Divide( 3, 2 ); // Divide the canvas us
  int i{1};
  // Clone each histogram and draw with a different style:
  for ( auto style : styles) {
    TH2F*   hi    = (TH2F*) h->Clone();
    hi->SetTitle(Form("Draw(\"%s\")", (const char*) style));
    c1.cd(i++);
    hi->Draw(style);
  }
  c1.cd();
  c1.SaveAs("histDraws2.png");
}