Is this a feature that is widely used? Typically the position nodes are not visible, only if they are explicitly shown by changing the data manager's preferences.
But I like the idea of being able to jump to different slices of a segmentation, regardless of the interpolation. I see this as a possibility to check the different parts of a segmentation easily and quickly being able to switch between different "parts" of a segmentation.

However, I tried to do this with different time steps of a 4D image and - not to my surprise - did not work correctly. A position node for t != 0 was not added and if the time slider was set to t != 0 I could not jump to the segmentation parts that were added on t = 0.

So I'm in favor of making this functionality work and placing it more prominently in the view.

The current solution was never meant as a user interface but only for saving slice positions in scene files. However, it turned out that it is quite handy to jump to drawn contours with a simple click so we should probably move the list of positions into the segmentation view itself if needed.