---
title: CGMouseButton.left
framework: coregraphics
role: symbol
role_heading: Case
path: coregraphics/cgmousebutton/left
---

# CGMouseButton.left

## Declaration

```swift
case left
```

## Discussion

Discussion Specifies the only mouse button on a one-button mouse, or the left mouse button on a two-button or three-button mouse.

## See Also

### Constants

- [CGMouseButton.right](coregraphics/cgmousebutton/right.md)
- [CGMouseButton.center](coregraphics/cgmousebutton/center.md)