The preview shows a simple mailing which can be opened and closed.
Please click the radio buttons to see how the states change. Try to drag and move the object also.
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A really strong usage of the preview functionality is when creating previews of printing PDFs. Have a look at our small demo shown in this video.
The video shows how an existing PDF file is getting rendered to a 3D preview, that can be dragged and turned around.
You are looking for next-gen software for the printing industry and we have the solution.