Offset

It allows to transform line or polygon objects.

Start by selecting the Offset tool from the drawing toolbar.

NOTE: This tool works with existing objects, therefore you need to select and object to see this option as available.

Offset: Separation between the existing object and the new object.
Units: Choose the units of measurement.
Target Layer: Select the layer where you want to save the new object.
Offset type:
Line to Polygon (selected object is a line, and target layer is polygon).

- Add points to create an adjacent polygon: the resulting object will keep a polyline shape, but it will be offset by the distance entered in "Offset".
- Close polyline to convert to a polygon: it joins the last point with the first one, creating a closed shape.
Polygon to line (selected object is a polygon, and target layer is a line).
- Eliminate the union between the first and last points: This command "brakes" the polygon.
- Repeat last point to close a polygon: This command will produce a polyline that follows the shape of the selected polygon.
Polygon to Polygon

- Don't Modify: Duplicates an object with the dimensions of the selected object, and with a offset distance equal to the "Offset" field.
- Substract the polygons: it works the same way as the previous option, except that the resulting shape has the original object "substracted".
Show/Hide original objects: this option is used for preview the results.