How to change the label of an item using the process flow. I have a simulation that contains 2 sources that create 3 different models, and they work by orders. When a model from my source 1 goes to processor 31, I would like to move the items from my source 4 from processor 51 to processor 48. I can do this easily. What I'm having trouble with is when my product from source 4 leaves processor 51, I want it to change color to match the color of my models from source 1. How can I do this?