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# drawArrow(_:highlight:)

Draws the scroll button indicated by `arrow`, which is either `NSScrollerIncrementArrow` (the down or right scroll button) or `NSScrollerDecrementArrow` (up or left).

```
func drawArrow(_ whichArrow: NSScroller.Arrow, highlight flag: Bool)
```

## Discussion

If `flag` is <doc://com.apple.documentation/documentation/Swift/true>, the button is drawn highlighted; otherwise it’s drawn normally. You should never need to invoke this method directly, but may wish to override it to customize the appearance of scroll buttons.

> Note:
> The ``doc://com.apple.appkit/documentation/AppKit/NSScroller/drawArrow(_:highlight:)`` method is not invoked in macOS 10.7 and later.

## See Also

[`func rect(for: NSScroller.Part) -> NSRect`](/documentation/AppKit/NSScroller/rect(for:))

Returns the rectangle occupied by `aPart`, which for this method is interpreted literally rather than as an indicator of scrolling direction.


---

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