How to plot a TH3D histogram and a TGraph2D graph together

[zhiyiliu]

I found your reply to the post:

External viewer with TH2D (and TH3D)?

Hi ROOTERS Is it possible to use the opengl external viewer when plotting a TH2D (with lego2 option for instance) or a TH3D histogram? I tried the “ogl” option as described in the manual but it seems to work only with geometries. The problem is that I have histograms with a lot of bins and with the gl-in-pad method, with no hardware acceleration, it is very slow. Thanks.

which mentioned something ‘real’ gl pad.

Another puzzle: I cannot print my canvas in batch (the printed picture is empty), I am curious why?