Hi Jeff, The volume path tracer markers are saved in session files so you can use saving and restoring a session to duplicate them. For IMOD surfaces you will just have to open them a second time. To get them to match the position of the already open IMOD surfaces in cases where you have moved some models relative to others you would use the Model Panel / Transform As button to match the positioning of the IMOD copy surface model to its twin. When you open a new model in Chimera and already opened models have been moved relative to one another, the new model will get the same positioning matrix as the already opened model with lowest id number. The id numbers are reported in Model Panel (starting at 0). This is why the "Transform As" operation may be needed. Tom