{
   auto c3 = new TCanvas("c2","c2",500,300);

   auto legend = new TLegend(0.2, 0.2, .8, .8);
   auto h = new TH1F("", "", 1, 0, 1);

   legend->SetNColumns(2);

   legend->AddEntry(h, "Column 1 line 1", "l");
   legend->AddEntry(h, "Column 2 line 1", "l");
   legend->AddEntry(h, "Column 1 line 2", "l");
   legend->AddEntry(h, "Column 2 line 2", "l");

   legend->Draw();
}