How to export Rolll20 maps?

https://app.roll20.net/forum/post/2280/exporting-a...
Couldn't find an answer there and it was over two months old. I have a map background I want to export how do I do that?

Also related question, if I make a campaign as a mentor then copy it with dnymaic lightning and stuff, can my friend who is a mentor use the dynamic lightning on that map even though I'm a creator? Can my friend who isn't a mentor or subscriber use it too? How it work?

As far as I am aware, there's no way to export maps unless you're a Mentor and just using it for another campaign. Otherwise, you'd have to just use screen capture.

@RMcD: At the moment there are two ways to copy a map on Roll20. The first is to use screenshots, but that will just create a single image that can't be edited in the same way. If you want to copy all of the individual images over to another campaign, and you are a Mentor, you can use the transmogrifier to copy the page over into another campaign you created.

In answer to your second question: Yes, if you copy the page over to another of your campaigns, and give a friend GM privileges for that campaign, they will have access to the dynamic lighting tools. As a rule, any campaign that you create has dynamic lighting activated. However, this does not apply to campaigns that someone else has already made and then promoted you to GM status.