User data can be sent to a printer whenever an end entity is added or edited. The functionality is practically the same as for notifications.
This is configured in the end entity profiles by selecting a printer, the number of copies and uploading a SVG formatted template. There exists a template in 'src/cli/svgTemplate/Batch PIN envelope print.svg' that can be used for testing.
A good SVG client can be downloaded from inkscape.org
In order to renew the list of available printers you must restart the http session since the list is cached for performance reasons.