void test_th3d_OS()
{
auto h = new TH3D("array_histo", "array_histo", 10, 0, 10, 10, 0, 10, 10, 0, 10);

h->Fill(1,1,1,5);
h->Fill(9,9,9,2);

h->GetZaxis()->SetTitle("aaa");

h->Draw("box2z");
gPad->SetMargin(0.1, 0.2, 0.1, 0.1);
gPad->Modified();
gPad->Update();

// make new TPaletteAxis with a fake histogram inheriting
// features from original except title of zaxis

auto p = (TPaletteAxis*)(h->FindObject("palette"));
if (p == NULL) return;
auto dummy_axis= new TPaletteAxis();
auto dummy_hist = (TH3D*)h->Clone();
dummy_hist->SetName("dummy");

dummy_axis->SetHistogram(dummy_hist);
dummy_axis->SetX1(p->GetX1());
dummy_axis->SetX2(p->GetX2());
dummy_axis->SetY1(p->GetY1());
dummy_axis->SetY2(p->GetY2());
dummy_hist->GetZaxis()->SetTitle("vvv");

//remove original

h->GetListOfFunctions()->Remove(p);
delete p;

// draw without option z
h->Draw("box2");
dummy_axis->Draw();
gPad->Modified();
gPad->Update();
}