Save image with background

[jepessen]

I've create a new theme that I want to use for saving diagrams.
I've set a color for the background, but when I save the diagram with Publish->Save Image->Save to File, the background is white.

How can I save the diagram with the background that I've set?

[skiwi]

EA V13 adds a Document Appearance Option "Document with background color" which may be what you are after.  Preferences> Diagram > Appearance