The original pipe is displayed in red by default, and the returned stress pipe is displayed in green by default. Both of these colours can be changed in the Interface Settings, refer to Interface Settings for further information.

To alter the transparency of the currently active stress group, click in the Main Group drop-down menu (set to Solid as default). Both the Main Group and the currently selected Load Case can be changed independently.

Off removes the current active group from the Pipework Application 3D window.