ComputerationDynamics has a nice look at GP 2010’s new Drill Down builder in their GP 2010 Feature #6: Drill Down Builder Deep Dive post.
Drill Down Builder Deep Dive
Off-Topic & MiscellaneousGP 2010
Archived post from 2010. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.