Hi Thomas,
RCanvas is an attempt to fully redesign functionality of TCanvas.
It made from absolutely different building blocks.
Primary goal of RCanvas - provide display of ROOT7 objects like RHist or RGraph.
But if one uses RCanvas to display “normal” TH1 or TGraph objects, it behaves mostly the same as TCanvas. I plan to provide some additional functionality with CSS-styling (which is supported by RCanvas), but do not have time yet to do this for TObject-derived classes.
Regards,
Sergey