---
title: deltaZ
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nsevent/deltaz
---

# deltaZ

The z-coordinate change for a scroll wheel, mouse-move, or mouse-drag event.

## Declaration

```swift
var deltaZ: CGFloat { get }
```

## Discussion

Discussion This value is typically 0.0.

## See Also

### Getting scroll wheel and flick events

- [deltaX](appkit/nsevent/deltax.md)
- [deltaY](appkit/nsevent/deltay.md)
- [hasPreciseScrollingDeltas](appkit/nsevent/hasprecisescrollingdeltas.md)
- [scrollingDeltaX](appkit/nsevent/scrollingdeltax.md)
- [scrollingDeltaY](appkit/nsevent/scrollingdeltay.md)
- [momentumPhase](appkit/nsevent/momentumphase.md)
- [isDirectionInvertedFromDevice](appkit/nsevent/isdirectioninvertedfromdevice.md)