Opens a dialog that performs operations on linear features that are generated by Point Lists.  Point list Linear Features are comprised of a list of points and the order of the points indicate the linear feature geometry. Linking codes also dictate the shape of the linear feature. The manage point list dialog allows the user to add, remove, replace or reorder points in a point list linear feature. In addition, the linking code of any point in the in the linear feature can be changed using this dialog.