Getting a HighRes Images from the generator

Hi,

is there a way to get the images/drawings/texts as a high res picture?

Right now I'll get a rendered picture with the dimensions of the stage.

"stageWidth"

"stageHeight"

Then I get the sources as either base64 or svg or text. 

How can I largen the stage and scale all UI accordingly? Is there a best practice?

Thanks!