To Offset a Boundary Curve
1. Select a one-sided edge, such as the edge of a quilt, and click Model > Offset. The edge is highlighted, and the Offset tab opens. The selected curve appears in the Boundary edge collector on the References tab.
2. Drag the handle to change the offset distance You can also enter a value in the value box or double-click the dimension and enter a new value.
3. Click to flip the direction of the offset.
4. Click OK to complete the boundary offset curve.