I want to draw shapes (only a border, not a fill) on a image with the mouse. I also want to save the result as a jpg on the server.
What I tried
1. Set the image as the background of Diagram
2. Make "Fill class" of Shape transparent with CSS
This makes it look and operate perfectly.
However, if I use Diagram.ExportDiagram, the Shape will be filled and will be downloaded by the browser.
Is there a good way?