The Distribute Values Rule allow users to distribute values from merged records into multiple (empty) fields in the master record.
In order to use the rule, drag-and-drop it from the Advanced > Fields section into the Rule designer.
- Attach the field name connector from Advanced > Fields section
- Finally, specify the field names that will be used to store the values. Note: the order of the field names will be the order that they are populated, with the upper most field name being the first in the order to be filled.
The picture below illustrates what will happen when the Distribute Values rule is executed. Rather that losing the Business and Home Phone numbers, they will be copied to the other empty fields specified in the rule. 
Note: In the event multiple rules are included, they will be executed in the order shown on the screen.