Png export for transparent areas.

It would be great if we could have a tool to mark certain areas as transparent, and then beign able to export those.

I use DA a lot but I still use a lot of personal tokens, items ect to place it on roll 20 and other stuff.
Also larger maps tend to work badly on roll20 and i think if a part of the map doesn't exist it will go smoother as it doesn't need to render anything. ( will test this hypothesis)

But in general being able to ad transparency to maps would be cool.