svg graphic sizes

[<paul oshaughnessy ubs com>]

Apologies if this is a newbie question, but can't see the answer in the FAQ

I'm creating a large network diagram and exporting to svg. Is there a way I can control the default size of 
the svg? Although the dia image may be say 50cm X 50cm, I'd like the svg to be 'zoomed out' to about 10 X 10 
as the default view.

Thanks

Paul

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