Etelligent Solutions digs into Dynamics GP 2013 R2 – New Features in The Foundation Modules
Dynamics GP 2013 R2 – New Features in The Foundation Modules – Etelligent Solutions-
Tips & Hidden FeaturesGP 2013
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.