Designing print format for pre-printed papers

This might be out of topic for ERPNext. In that case, I’m sorry.

I have a customer who ordered like a million of pre-printed invoice papers (with headers, tables, fields, etc) sitting in a cabinet. They want ERPNext to print out to these papers instead of buying additional blank papers.

I know that I need code the format using jinja template to get something like this. But my question is in testing the format. I have a scanned image of their pre-printed page. Any idea on how to test-print to this scanned image (like to a PDF file), instead of actually printing out to test and waste papers?

Again, I’m sorry if this is out of topic for ERPNext.

Thanks!

You can try out adding it as a water mark and see where fields fit it. Go through this thread, might help you.