# Surface Tangent

## <img src="https://3375153115-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5uhW8FwQpXQj8tHUULMo%2Fuploads%2FMXjD2VsC0oYQiDCwSueO%2FG5_03_SURFACE_ADVANCED_TANGENT.png?alt=media&#x26;token=24e62a17-7a68-4de3-875c-1ae881a849e4" alt="" data-size="line"> Surface Tangent

The SetSurfaceTangent command sets an untrimmed surface edge tangent direction.

**Steps**

1. Select an untrimmed surface edge.
2. Pick the base point for tangent direction.
3. Pick the second direction point.

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