I have no idea which computers they use, how could I?
That they use Macs seems unlikely, however, and that is hardly the point.
PDF = portable document format, yes? So anyone on any computer sends receives reads makes PDFs.
I am getting more pertinent help regarding copyright-protected work and forwarding-of on another forum, but thanks for now.
Sorry, guess i simply misread the problem... and now i've lost interest
altogether.