For each IEP operator that you added, do the following:
Double-click the operator. Alternately, you can click the operator, go to the Properties window, and click the ellipsis.
The property editor opens.
Edit the appropriate properties. For some operators, you can add or modify attributes.
(Optional) Click the Documentation tab and supply notes on this component.
Click OK.
Connect the operators to each other as appropriate.
You send the output of one operator to the input of another operator by selecting the output port of the first operator and dragging it to the input port of the second operator.