---
title: knobProportion
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nsscroller/knobproportion
---

# knobProportion

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

## Declaration

```swift
var knobProportion: CGFloat { get set }
```

## Discussion

Discussion This property contains a floating-point value from 0.0 (minimal size) to 1.0 (fills the slot).