Altico digs into the rarely used Drill Down Builder. Just to be clear, this isn’t new functionality in GP 2013. It’s there in 2010.
Dynamics GP 2013 New Features – Drill Down Builder | ERP Software Blog
Tips & Hidden FeaturesMicrosoft & the GP EcosystemGP 2013
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.