number axis values plotted

Dear ROOTers,
is there a way to control the number of axis values plotted?

In the attached example I would like to have only the values 0, 2, 4, 6, 8 and 10 plotted next to the axis of the first histogram whose axis ranges from 0 to 10. Having all integer values from 0 to 6 on an axis from 0 to 6 (second histogram) is fine.
As you can see, I found a small trick (third histogram), but that does not solve my general problem that I sometimes want to divide the umber of plotted lables by two.
I did not manage with TAxis->SetNdivisions(...) ...

Cheers

        Gero

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TEXT/PLAIN attachment: axismacro.C