---
title: on
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nscontrol/statevalue/on
---

# on

A constant value that indicates a control is on or selected.

## Declaration

```swift
static var on: NSControl.StateValue { get }
```

## See Also

### Setting a Control’s State

- [off](appkit/nscontrol/statevalue/off.md)
- [mixed](appkit/nscontrol/statevalue/mixed.md)