Hi Saad,
I would refer you to the authors of the eXamine app since they have their own canvas. If you want to save the contents of the Cytoscape network window in high resolution, we can certainly help you. However, I can say, that if they are saving the file as SVG, it *should* be resolution-independent. That is, there shouldn't be any specific resolution since SVG is a vector format, unless they are saving their canvas as an image encapsulated by SVG.
-- scooter