Z axis title TH2D

I noticed that if I draw my th2d with ->Draw(“SURF2”) and I want to put a title on the z axis then It will be put horizontally.
How can I rotate it by 90 degrees?


I just tried. For me it is by default painted vertically.

yeah, sorry…
I wanted to say the opposite, I wanted it horizontally and not vertically.
thanks a lot,

It is always vertical.
To bypass it you can draw the axis without title and add yourself a horizontal text near the axis.

thanks a lot!