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# setFloatValue:knobProportion:

Sets the position of the knob to `aFloat`, which is a value from 0.0 (indicating the top or left end) to 1.0 (the bottom or right end).

```
- (void) setFloatValue:(float) value knobProportion:(CGFloat) proportion;
```

## Discussion

Also sets the proportion of the knob slot filled by the knob to `knobProp`, also a value from 0.0 (minimal size) to 1.0 (fills the slot).

## See Also

[`var knobProportion: CGFloat`](/documentation/AppKit/NSScroller/knobProportion)

The proportion of the knob slot that the knob should fill.

[`var floatValue: Float`](/documentation/AppKit/NSControl/floatValue)

The value of the receiver’s cell as a single-precision floating-point number.


---

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