To convert the side of a raster line or the outline of a raster object

Select Convert Lines.
Select the appropriate color mask.
Choose Outline in the Entity option menu.
Identify the side of the raster line or object to be converted by entering a data point on the side (or just outside) of it.
The resulting vector element follows the edge of the raster line or object in both directions from the starting point. Only existing nodes stop this automatic conversion.

CAUTION: Since it is the only way to control the Outline mode, it is recommended that you place nodes in the appropriate positions prior to start.