Page setup in centimeters

[Corentin Cras-Méneur]

	Hi All,


  One thing I don't understand... I use OmniGraffle using all units  
in centimeters.
I've tried to create new documents using custom settings (eg:  
32cmx10.5, no margin) and no matter what I do, the page is never  
actually 32x10.5. You can see it with the rules or even visualize it  
easily with the grids, but the document is way shorter.
Even the regular A4 format, which is supposedly 21x29.7 is actually  
18.4x27.2 accroding to grids and rulers.

So what's wrong ??? What am-I missing ???

	Corentin