Default scaling

[darthalias]

Great plugin. I'm finding it very useful, Thanks!

I do wish it was better at initial scaling for the diagrams though. Or, maybe had a couple scaling options that could be selected.

I think the default should be to fit the diagram to window. The SVG view does this nicely, so I'm using that view mostly.

Except for sequence diagrams, there I think the default should be to fit to the width of the window. I have several looooong system-level sequence diagrams that show up unreadably tiny on my HiDPI monitor in either view.

Thanks.