Select the PROCESS designer. Click Define Business Entity from the top ribbon menu Main.
Select the correct business entity model (travel expense list) in the foreground dialog, double-click it to add it and hit OK to close.
In the background dialog double-click the travel expense list on the left side to add it to your process model. Click OK to close.
In the upper left corner of the canvas, you can now see the used business entities and workflow variables represented as small cubes.
