# CVADD Command
[GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md)
**Function Description:**
This command is used to add control vertices to NURBS surfaces and splines.
**Command Access:**
> **Icon:** 
> **Menu:** Modify > Surface Editing > NURBS Editing > Add CV
> **Ribbon:** Surface > CV > Add
> **Toolbar:** /
> **Command:** CVADD
> **Alias:** /
**Command Prompts:**
```
Select a NURBS surface or curve to add control vertices:
```
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**Related References：**
- [Commands about Constructing 3D Solids and Surfaces from 2D Geometry (GstarCAD 2026)](../../2026/Commands/Commands%20about%20Constructing%203D%20Solids%20and%20Surfaces%20from%202D%20Geometry.md)
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[Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences/CVADD.html) · © Gstarsoft Co., Ltd.