Try exporting the pdf from Preview as a jpeg. Those you can flip.
If each of these are single pages, she could take a screenshot of the flipped image. The resulting PNG might be what she's after. Admittedly, that's a crap workaround so I'll get about finding a better one.![]()
Or, she could print on semi-transparent (or even transparent) paper...
When using the HP Deskjet Series USB Universal driver on a Macintosh, the Paper Type/Quality setting no longer includes the HP Iron-on T-shirt Transfers (C6049A) paper.