# ModifierKey enum

Namespace: [Rhino.UI](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.ui.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md) · Since v6.0

```cs
[Flags]
public enum ModifierKey
```

Keyboard keys typically used in combination with other keys

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | 0 | No key |
| Control | 1 | Ctrl key on Windows |
| MacCommand | 1 | Command key on Mac. This is treated the same as Control key on Windows |
| Shift | 2 | Shift key |
| Alt | 4 | Alt key |
| MacControl | 8 | Control key on Mac |