To make additional input data available to the transform, you can specify a secondary connection to a transform. You must define the connection type as supplement connection for additional connections to a Join transform or to a For each transform. You must define the connection type as primary connection for additional connections to any of the other transforms.
You can also change the preferences of the Graphical Data Mapping editor. You can set the Let optional connection be primary for transforms that do not accept anymore primary connections preference.
The following steps show how to connect multiple input elements to a transform by using the drag and drop method:
When you have created the connection between your input and output objects, select the required transform as described in Specifying a transform (mapping operation).