====== Configure labels and title ====== histo->GetYaxis()->SetLabelSize(.1); // font-size of Numbers on axis in percent of ??? histo->GetYaxis()->SetTitleSize(.12); // font-size for title in percent of ??? histo->GetYaxis()->SetTitleOffset(.2); // distance between axis and title in percent of normal distance histo->GetYaxis()->SetTitle("mySweetTitle");