Welcome to lesson 6 of Code Breaking 101: Image Manipulation.
Since the Niantic Project shut down, new media is only posted on Niantic Project pages on G+ and Facebook, with a new person behind it, known only as x. Because most new media will be released as images (comic pages, scanned documents), you should know some basic image manipulation, in order to get the codes hidden in there.
This small tutorial is created to help you with some common hiding tricks used by Niantic.
Article by Miloš Mirković