---
title: MTLStencilOperation.keep
framework: metal
role: symbol
role_heading: Case
path: metal/mtlstenciloperation/keep
---

# MTLStencilOperation.keep

A stencil operation that doesn’t modify a stencil value.

## Declaration

```swift
case keep
```

## See Also

### Stencil operations

- [MTLStencilOperation.zero](metal/mtlstenciloperation/zero.md)
- [MTLStencilOperation.replace](metal/mtlstenciloperation/replace.md)
- [MTLStencilOperation.incrementClamp](metal/mtlstenciloperation/incrementclamp.md)
- [MTLStencilOperation.decrementClamp](metal/mtlstenciloperation/decrementclamp.md)
- [MTLStencilOperation.invert](metal/mtlstenciloperation/invert.md)
- [MTLStencilOperation.incrementWrap](metal/mtlstenciloperation/incrementwrap.md)
- [MTLStencilOperation.decrementWrap](metal/mtlstenciloperation/decrementwrap.md)