you can export to html, open it, and then just create printscreen out of it. easy (but respect the licensing)! some browsers (edge,firefox,vivaldi, maybe others) have built in functionality for this. let me know if you have other questions.
ok, is there documentation.
currently not, there are only a handful of controls. try to play around with it (most of the settings have a direct visual feedback / reaction, should therefore be self-explanatory. at the bottom, there are indicators which properties are being used to generate the visual. if the need arises, we will create a demo-view. let me know if you are interested.