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# CGScreenUpdateMoveDelta

The distance, in pixel units, that an onscreen region moves.

```
struct CGScreenUpdateMoveDelta
```

## Overview

Move operation notifications are restricted to changes that move a region by an integer number of pixels. The fields `dX` and `dY` describe the direction of movement:

- Positive values of `dX` indicate movement to the right.
- Negative values of `dX` indicate movement to the left.
- Positive values of `dY` indicate movement downward.
- Negative values of `dY` indicate movement upward.

## Topics

### Initializers

[`init()`](/documentation/CoreGraphics/CGScreenUpdateMoveDelta/init())

[`init(dX:dY:)`](/documentation/CoreGraphics/CGScreenUpdateMoveDelta/init(dX:dY:))

### Instance Properties

[`dX`](/documentation/CoreGraphics/CGScreenUpdateMoveDelta/dX)

[`dY`](/documentation/CoreGraphics/CGScreenUpdateMoveDelta/dY)


---

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