How can I change the size of the font of the TLegend’s header? Thanks in advance.
{
TFile f("hsimple.root");
hpx->SetFillColor(48);
hpx->SetMarkerStyle(20);
hpx->SetMarkerSize(1);
hpx->Draw("HP");
TLegend *leg=new TLegend(0.2,0.2,0.4,0.4);
leg->SetFillColor(0);
leg->AddEntry(hpx,"hpx e^{-} #alpha #times","fp");
leg->SetTextFont(132);
leg->SetHeader("Legend");
leg->SetTextFont(42);
leg->Draw();
TLegendEntry *header = (TLegendEntry*)leg->GetListOfPrimitives()->First();
header->SetTextAlign(22);
header->SetTextColor(2);
header->SetTextSize(.09);
}