Hello,
"Attach Serial" creates an image (mostly PNG).
"PDF Serial" creates a PDF.
The two plugins have globally the same configuration; one takes a PNG as "template" (an image used as the base and the plugin "print" information on it); the other creates a PDF file (and can also use another PDF as "template").
So you can read the "attach serial" documentation page and you will have the general process for both:
www.hikashop.com/support/documentation/1...ns-attachserial.html
Now, it looks like you want to generate a PDF, so "PDF Serial" is the one to choose.
The starting point is to know if you will use an existing PDF as "template" or you want to start with a blank A4 page and "print" information on it.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.