Hello,
Yes, you can add an instruction pdf using a field of type metaFile.
Go through this document for more info on metaFile and adding attachment: Axelor :: Add Attachment
You can also send it by email using an email template. create an email template and add the file as an attachment to this template.
[Note you May need to create a Birt report template for instructions. go through this forum question for more about Birt Report: BIRT Report Quick start]
If you have any further questions or require additional assistance, please don’t hesitate to ask.
Best regards,