{
   auto *Ta = new TCanvas("Ta","Text angle",0,0,300,326);
   Ta->Range(0,0,1,1);
   TLine l;
   l.SetLineColor(kRed);
   l.DrawLine(0.1,0.1,0.9,0.1);
   l.DrawLine(0.1,0.1,0.9,0.9);
   TMarker m;
   m.SetMarkerStyle(20);
   m.SetMarkerColor(kBlue);
   m.DrawMarker(0.1,0.1);
   TArc a;
   a.SetFillStyle(0);
   a.SetLineColor(kBlue); a.SetLineStyle(3);
   a.DrawArc(0.1, 0.1, 0.2, 0.,45.,"only");
   auto *tt = new TText(0.1,0.1,"Text angle is 45 degrees");
   tt->SetTextAlign(11); tt->SetTextSize(0.1);
   tt->SetTextAngle(45);
   tt->Draw();
   auto *t1 = new TLatex(0.3,0.18,"45^{o}");
   t1->Draw();
}