# ExtrudeSubD
## 
ExtrudeSubD
The ExtrudeSubD command extrudes SubD faces and boundary edges with different direction modes.
### **Steps**
1. Start the command.
2. Select SubD faces or boundary edges to extrude.
To extrude a whole SubD, select the SubD before starting the command.
3. Set command-line options.
4. Pick or enter the extrusion distance.
### Command-line options
#### **EdgeLoop**
Pick an edge on the boundary to select an edge loop.
#### **Basis**
* **WCS**
All faces or boundary edges extrude in the same direction based on world coordinates.
* **Direction**
**Free**
The direction is picked freely.
**X/Y/Z**
The direction is fixed to the world X, Y, or Z axis.
* **UVN**
Each face or edge extrudes in the direction based on UVN coordinates.
* **Direction**
**Free**
The direction is picked freely.
**V (Boundary edges only)**
Boundary edges extrude along the extending direction of the faces.
**N**
Faces extrude along vertex normal directions.
Boundary edges extrude perpendicular to the faces.
**SetBasePoint**
Picks a point as the starting point of the extruding distance.
For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/extrudesubd.htm#\(null\)).
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