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legend3.C
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1 {
2  TCanvas *c3 = new TCanvas("c2","c2",500,300);
3 
4  TLegend* leg = new TLegend(0.2, 0.2, .8, .8);
5  TH1* h = new TH1F("", "", 1, 0, 1);
6 
7  leg-> SetNColumns(2);
8 
9  leg->AddEntry(h, "Column 1 line 1", "l");
10  leg->AddEntry(h, "Column 2 line 1", "l");
11  leg->AddEntry(h, "Column 1 line 2", "l");
12  leg->AddEntry(h, "Column 2 line 2", "l");
13 
14  leg->Draw();
15  return c3;
16 }
17