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# scaleBy(x:y:)

Changes the scale of the user coordinate system in a context.

```
func scaleBy(x sx: CGFloat, y sy: CGFloat)
```

## Parameters

`sx`

The factor by which to scale the x-axis of the coordinate space of the specified context.

`sy`

The factor by which to scale the y-axis of the coordinate space of the specified context.

## Discussion

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