Duplicating Contours

To duplicate a part of the contour, the whole contour or several contours, select them as described in Selecting Segments and Selecting Contours and choose the Edit > Duplicate (CmdD) menu command.

The selection will be duplicated in the same element, shifted by the distance set in Preferences and remain selected so you can also move it or transform in other ways.

Alternatively, press the Alt key and drag the selection to make a copy.