How to have both histograms in upper pad display error bars with a TRatioPlot

ROOT
2 
auto rp = new TRatioPlot(h1,h2);
rp->SetH1DrawOpt("E3");
rp->Draw();

Or, if you feel hacky, you may try (I haven’t checked it):

auto rp = new TRatioPlot(h1,h2);
rp->Draw();
rp->GetUpperRefObject()->SetDrawOption("E3");
gPad->Update();