Lowcase in label

Sorry for naive question.
How one can set label with lowcase letters like for example Pt . I suppose the TLatex class should be used but how use it with SetXTitle(" ") function ?

Charater strings drawn with TLatex are case sensitive. So, a TLatex string like “Pt” will appear that way … of course…

It is the same with the axis titles. You can use: h->GetXaxis()->SetTitle(“X title”); where “h” an histogram or a graph.