Hi, In a tree, when I draw directly, lets say: TTree *h800; .... h800->Draw("x1:x2"); in the plot that appears I can change the attributes of the axis since htemp is created. However, if I want change the attributes of the markers (color and size), I can not do it.. can someone indicate me how to do it or point to same example.. thanks a lot.. ################################################### Antoni Munar Ara Department of Physics and Astronomy David Rittenhouse Laboratory University of Pennsylvania 209 South 33-rd Street Philadelphia, PA (USA) 19104-6396
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