# Boss

## <img src="/files/SskTgRdBo7EKiZjKttgi" 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).


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