Canvas divide

Hello !

          I have a code where I divide a canvas and in each of the subcanvases I draw a plot. My problem is that I would like to optimise the space and I don't want each subcanvas to have the y-axis and the title (since they are all the same), I would like to have just one common y-axis on the left and the rest of the space EVENLY distributed for all the plots. 



Using version 4.02 or newer, see the tutorial zones.C