Offset Curve

Used to construct an offset curve from an element (line, line string, multi-line, curve, arc, ellipse, shape, complex chain, or complex shape) — a B-spline curve that is the same distance from the identified element at all points.

Tool Setting	Effect
Gap Mode	Sets how “corners” are treated in the offset curve. Miter — Where necessary, straight sections that form sharp “corners” in the original element are extended to fill the gaps and maintain sharp “corners” in the offset curve. Round — Where necessary, rounding is added to fill the gaps where straight sections in the original element would leave gaps in the offset curve. Original — Maintains the original geometry of the curve. The distance between the elements may vary.
Distance	If on, sets the distance to offset.
Make Copy	If on, the element is copied and the original is not manipulated.
Use Active Attributes	If on, uses the same active element attribute settings.

To construct an offset curve

Select the Offset Curve tool.

Identify the element.

Enter a data point.

Distance	This data point defines
Off	Distance and direction.
On	Direction only.


Constructing an Offset Curve (Make Copy on). Left: Gap Fill Mode set to Miter and Distance off. Center: Gap Fill Mode set to Round and Distance off. Right: Gap Fill Mode set to Round and Distance On.

Key-in: CONSTRUCT OFFSET CURVE