- >Effects > Contour Tool
- Choose Outside or Inside depending on where you want the offset
- Choose Offset distance
- Choose one step
- Select the existing vector line you want the offset from
- Click Apply
- Right click on created contour object > Break Contour Group Apart
- Delete the interior filled object if desired
- Remove fill by selecting filled area and clicking top right color pallet box with red X in it
Basic idea from this tutorial here http://community.glowforge.com/t/coreldraw-tutorial-for-creating-an-offset-path/2904