---
title: "BrightnessContrast..::.ContrastAmount Property "
canonical: https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Transforms_BrightnessContrast_ContrastAmount.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# BrightnessContrast.ContrastAmount Property 
 
Gets/sets contrast modifier.
 
**Namespace:** [Aurigma.GraphicsMill.Transforms](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Transforms.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```
Public Property ContrastAmount As Single
```
 
```csharp
public float ContrastAmount { get; set; }
```
 
### Property Value
Contrast modifier value varying in range [-1, 1]. Minimum value (-1) will produce absolutely gray image, neutral value (0) does no effect, maximum value (1) makes the image extremely posterized.
 
## Remarks
  
Default value is 0.
   
## See Also

### Reference

- [BrightnessContrast Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Transforms_BrightnessContrast.htm.md)
- [Aurigma.GraphicsMill.Transforms Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Transforms.htm.md)