void latex_url()
{
   auto c1 = new TCanvas("c1", "Use of #url in TLatex", 1200, 800);

   auto latex = new TLatex(0.5, 0.5, "Link on #color[4]{#url[https://root.cern]{root.cern}} web site");
   latex->SetTextSize(0.1);
   latex->SetTextAlign(22);
   latex->SetTextAngle(30.);
   c1->Add(latex);
   c1->Print("c1.svg");
   c1->Print("c1.pdf");
}