Go Hands On With Microsoft Dynamics GP 2015 R2: Set Up Drill Down with Ian Grieve.
Hands On With Microsoft Dynamics GP 2015 R2: Set Up Drill Down | azurecurve
Microsoft & the GP EcosystemGP 2015
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.