# Boss

## <img src="https://3375153115-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5uhW8FwQpXQj8tHUULMo%2Fuploads%2FlwnSjdQ2WWqszG7yNTee%2FBOSS.png?alt=media&#x26;token=db047c2d-191d-4e4c-9a95-78b84804d7a8" alt="" data-size="line"> Boss <a href="#profiles" id="profiles"></a>

The Boss command extrudes closed planar curves normal to the curve plane toward a boundary surface where the boundary surface is trimmed and joined to the extruded objects.

**Steps**

1. Select planar curves.
2. Select a surface or polysurface boundary.\
   If a curve is inside a target (for example, circle inside a box), then a hole is created.

#### Command-line option

-Mode: Sets the style for the extrusion.

* Straight: Extrudes the curves straight.
* Tapered: Extrudes the curves with a draft angle.
  * DraftAngle: Sets the angle of the taper

For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/boss.htm).