Click New or Edit to edit the Rollup Definition.

The Rollup Definition screen has two main sections:

a) The step by step guide

b) Details - to check selections and/or overwrite

In most situations, there is no need to edit details.

When creating a rollup definition, there is no need to enter a name. If not provided, a meaningful name will be generated (TargetObject TargetField Aggregation SourceObject SourceField)

Step by Step Guide

 ... to be provided ...