Modifying Existing SmartLists seems a pretty cool new feature in SmartList Builder.
The eOne Dynamics GP and CRM Blog: SmartList Builder 2013 New Feature of the Day: Modifying Existing SmartLists
Reporting & BITips & Hidden FeaturesMicrosoft & the GP Ecosystem
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.