Hi, I've met the following problem. I have a TH2F with user specified bins (both in X and Y) which I draw in a pad : gPad->SetLogx(1); gPad->SetLogy(1); histo->Draw("cont4"); What I get is a correctly drawn histogram and the newly created axes are: X from 1.0e-1 to 3.0, Y from 1.0e-5 to 1.0e-3. Now I would like to Draw a TMarker in the "min" of this histogram (let's say x=1.0, y=1.0e-4), so I try : TMarker *m = new TMarker(1.0, 1.0e-4, 29) m->Draw(); The problem is ... either the marker is not drawn at all or it appears on a completely crazy position. If I "Inspect" the marker which is displayed, I get some coordinates, but I cannot find any function which translates between these coordinate systems (none of them is NDC[0,1]). Could you, please, help me, Thanks in advance, Best regards, Jacek.
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