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# buttonMask

A bit mask of the buttons required to recognize this press.

```
var buttonMask: Int { get set }
```

## Discussion

Bit 0 represents the primary button, bit 1 is the secondary button, and so on. So to track clicks of the secondary button, assign the value `0x2` (which corresponds to a `1` in bit 1) to this property. The default value of this property is `0x1`, which detects clicks in the primary mouse button.

Changing the value of this property also sets the values of the [`delaysPrimaryMouseButtonEvents`](/documentation/AppKit/NSGestureRecognizer/delaysPrimaryMouseButtonEvents), [`delaysSecondaryMouseButtonEvents`](/documentation/AppKit/NSGestureRecognizer/delaysSecondaryMouseButtonEvents), and [`delaysOtherMouseButtonEvents`](/documentation/AppKit/NSGestureRecognizer/delaysOtherMouseButtonEvents) properties to <doc://com.apple.documentation/documentation/Swift/true> for each of the buttons you specified.

---

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