An outer thread can be converted into individual elements or Bézier parts using the corresponding Element > Convert menu command.

The conversion to individual elements generates an ellipse from the thread edge and ellipse segments from the individual thread turns. These elements are initially grouped together after being converted. You can ungroup them by means of the Element > Ungroup command. All individual parts can then be edited separately.

The Element > Convert > into Bézier parts command converts the thread edge and thread turns into individual Bézier curves.