---
title: "Lut..::.IsExtended Property "
canonical: https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_Transforms_Lut_IsExtended.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/)

# Lut.IsExtended Property 
 
Switches LUT between extended and non-extended mode.
 
**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 IsExtended As Boolean
```
 
```csharp
public bool IsExtended { get; set; }
```
 
### Property Value
Value that specifies if LUTshould be build for extended (16 bits per channel) or non-extended (8 bits per channel) bitmaps. If it is **true**, LUT entries number is 65536 and maximum value is 65535, otherwise entries number is 256 and maximum value is 255.
 
## Remarks
 If you create 16-bit LUT, then set this property to **false** (convert it to 8-bit), and after that set it back to **true**, LUT won't be the same as initially. Some information can be lost. It interpolates the missing entries linearly.
   
## See Also

### Reference

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