void palmove() {
   TCanvas *c1 = new TCanvas("c1");
   c1->SetLeftMargin(0.15);
   TH2F *h = new TH2F("h","test",40,-3,4,30,-3,3);
   double x,y;
   TRandom r;
   for (int i=0;i<10000;i++) {
      h->Fill(r.Gaus(0,1),r.Gaus(0,0.9));
   }
   h->Draw("colz");
   c1->Update();
   TPaletteAxis *p = (TPaletteAxis*)h->FindObject("palette");
   p->SetX1NDC(0.01);
   p->SetX2NDC(0.055);
   c1->Modified();
}