Offset
Create new paths at a fixed distance from selected closed or open paths.
The Offset dialog creates new paths at a specified distance from the selected paths. Use it for explicit kerf compensation, decorative borders, and inset or outset geometry.
When it opens
Choose Tools → Offset Shapes, or use Alt+O. At least one path must be selected.
Fields
| Field | Type | Notes |
|---|---|---|
| Distance | number | Follows the current Display Unit and has a minimum equivalent to 0.1 mm. Beam Bench stores the distance internally in millimeters. |
| Direction | select | For closed paths: Outward grows the shape, Inward shrinks it, and Both creates both results. |
| Side | select | When the entire selection contains open paths, Direction is relabeled Side. The choices are Side A, Side B, and Both Sides; the dialog defaults to Both Sides. |
| Corner Style | select | Miter, Round, or Bevel. Determines how outward-offset corners are treated. |
| Delete Original | toggle | Off by default. When on, removes the source paths after creating the offset. |
Buttons and preview
- Cancel: close the dialog without creating paths.
- Apply: create the displayed offset paths.
- The canvas shows a live preview and updates it when Distance, Direction or Side, or Corner Style changes.
Confirm that the preview appears on the intended side before applying the offset. Keep Delete Original off until you have verified the result; this preserves the source geometry if the direction or distance needs correction.
Kerf-compensation direction
For an exterior part contour, offset Outward by the measured kerf radius. For an interior opening, offset Inward by the measured kerf radius. There is no single direction that is correct for both.
Distance follows the current Display Unit. Convert a measurement made in another unit before entering it, then verify the resulting geometry with the live preview. Cut a scrap test and measure it with calipers before using the compensated path for real parts.