By default, print output generated by any customisable or personalised product will appear on a white background.
To generate PNG output files that places text and images onto a transparent background, simply upload a transparent piece of artwork (image file in PNG format) to the products print area. This tells the system to retain a transparent background when it produces PNG output files.
Critical: The uploaded file should match the specified Print Dimensions at the relevant dpi and must be PNG format.
In CPPv1 the artwork slot is located in the Print Area > Artwork menu:
For CPPv2, the Artwork upload slot can be found here:
An example file at A4 size is attached to this article.