---
title: keyEquivalentModifierMask
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nsbuttoncell/keyequivalentmodifiermask
---

# keyEquivalentModifierMask

The mask that identifies the modifier keys for the button’s key equivalent.

## Declaration

```swift
var keyEquivalentModifierMask: NSEvent.ModifierFlags { get set }
```

## Discussion

Discussion The value of this property is a mask that indicates the modifier keys that are applied to the button’s key equivalent. Mask bits are defined in NSEvent.h. The only mask bits that are relevant in button key-equivalent modifier masks are NSControlKeyMask, NSAlternateKeyMask, and NSCommandKeyMask bits.

## See Also

### Managing the Key Equivalent

- [keyEquivalent](appkit/nsbuttoncell/keyequivalent.md)
- [keyEquivalentFont](appkit/nsbuttoncell/keyequivalentfont.md)
- [setKeyEquivalentFont(_:size:)](appkit/nsbuttoncell/setkeyequivalentfont(_:size:).md)