Enfocus Community

We have PDFs supplied that contain 4up of different artwork.
What I'm trying to is create a separate thumbnail of each piece of artwork so that it can be used elsewhere.
The positioning is always the same.
Can that be done via Pitstop actions or is there an easier faster method to create these?

TIA

Ghostscript, an open source Postscript and PDF RIP, or a commercial RIP such as Apago's PSServices