Hi Thierry
Thanks for your reply, unfortunately, this only partially solves my problem. EMF does indeed keep all the graph features, but this file format is not supported by Latex. I've tried using EMF and then, for example, converting it to PNG but this loses the transparency which makes it look very bad in my article.
I've found that saving as PDF also seems to work, but this creates a very big mess with the margins and extra white space with most page sizes.