Enfocus Community

What is the best way to build a flow that inserts the last page between every page, regardless of how many pages the incoming PDF contains?

We often receive business cards as PDF files where the last page contains the back of the card, while the other pages contain the fronts with different people's contact details.

Try this app, it can do that:
https://www0.enfocus.com/en/appstore/pr ... -pages-pro

I can solve it, but it’s not pretty. I’m wondering how others have solved it, I guess that it’s quite common.