Receiving a PDF format drawing by email often means marking it with comments and modifications before returning it to sender.
This software does that without having to print out the drawing or have to rescan it.
It opens PDF files including large-format drawings, and allows them to be marked up on screen with ‘highligher pens’ of various types and it can be annotated. You can keep the marked and unmarked drawings on file. Martin has tried it and reports it as easy to use.
Its not free, but the site licence is reasonably priced.
A fully working 30-day demo copy is available online. It looks a bit clunky, but its fast enough, and the demo version leaves just a small notice on the output file so its fine to use for live projects.
http://www.informatik.com/imagistik.html
