The Protocol List tab contains a list of all the default protocols available for viewing images using Volume Rendering. The list also contains any new user-defined protocols that are added to suit user requirements.
NOTE: There are two default protocol settings, one for CT images (called CT Angio 1L) and another for MRI images (called MR Aorta 1L).
1. From the Viewer toolbar, click Edit VolR Protocol 
.
The Protocol window appears.
2. From the Protocol List tab, click the protocol with which you would like to view the image.
Each time you click a different protocol, the 3D view is changed accordingly.
3. Click OK to display the last selected protocol or click Cancel to return to the original protocol.
See these topics:
Working with Volume Rendering Protocols