We have an existing drawing where we he had accidently set the Synchronize View option to "None" in the Set Reference Presentation dialog.
We later needed to change this back to "Volume Only" but found that the Synchronize Vew option itself had disappeared.
How can we get this option back?
Navigate to the drawing model and from the References dialog choose the applicable Saved View from the Orientation column.
That should bring back the Synchronize View drop-down list set to "Clip Only", so from there you can change it back to "Volume Only".