seems I cant place a Canvas at a defined position on screen:  I would
expect TCanvas=new TCanvas("c","c",0,0,500,500) to produce a canvas in the
upper left corner of the screen, ("c","c",600,500,500,500)  something with
the upper left corner in the middle of the screen.  
I use root 1.03/09 on Linux 2.0.33 and XFree86 Version 3.3
cheers,
Otto
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Otto Schaile                    Sektion Physik der LMU Muenchen
Phone: (+49 89)289 14070        Am Coulombwall 1, D-85748 Garching, Germany
FAX:   (+49 89)289 14072        EMail: Otto.Schaile@Physik.Uni-Muenchen.DE