When you edit a port name in a transformation, by default, the Designer propagates references to that port in the expressions, conditions, and other ports in that transformation. You can also propagate changed attributes throughout the mapping.
The Designer propagates ports, expressions, and conditions.
We can propagate changes forward, backward, or in both directions.
Propagate attributes like port name, datatype, precision, scale, and description.
Propagate changes to dependencies along a link path or to implicit dependencies within a transformation.