Canvas and Pad dimensions

Dear all!

Could one of you tell me how to set the dimensions of a TPad in a Canvas or tell me where I can find the documentation? I am not sure what the numbers stand for.

TCanvas *c1 = new TCanvas("c1","Canvas",200,10,900,700); TPad *pad1 = new TPad("p","pad1", 0.05, 0.52, 0.95,0.97); TPad *pad2 = new TPad("p2","pad2", 0.05, 0.02, 0.95,0.47);

Cheers to all!

TCanvas::TCanvas(const char* name, const char* title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t wh)
TPad::TPad(const char* name, const char* title, Double_t xlow, Double_t ylow, Double_t xup, Double_t yup, Color_t color = -1, Short_t bordersize = -1, Short_t bordermode = -2)

I see, the coordinates are with respect to the lower left corner. Makes sense.