Mapping Arrays in Visual Data Mapper
Target Arrays must be mapped to an Array from the source, or configured using one of the advanced Array options.
To map the typical Array-to-Array scenario:
Select the Target Array.
Select the Source Array and drag it onto the Target Array.
Configure Target fields. Note that fields within the Target Array can be mapped to fields within the Source Array, as well as other fields within the Source. However, Target Arrays cannot be mapped to multiple Source Arrays.
See the help article: Mapping Arrays in Visual Data Mapper for a walkthrough of using this feature.