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# Key Transforms
Key Transforms modify the casing of keys and keys referenced in values in
serialized responses.
Provided key transforms:
| Option | Result |
|----|----|
| `:camel` | ExampleKey |
| `:camel_lower` | exampleKey |
| `:dash` | example-key |
| `:unaltered` | the original, unaltered key |
| `:underscore` | example_key |
| `nil` | use the adapter default |
Key translation precedence is as follows:
##### Adapter option
`key_transform` is provided as an option via render.
```render json: posts, each_serializer: PostSerializer, key_transform: :camel_lower```
##### Configuration option
`key_transform` is set in `ActiveModelSerializers.config.key_transform`.
```ActiveModelSerializers.config.key_transform = :camel_lower```
##### Adapter default
Each adapter has a default transform configured:
| Adapter | Default Key Transform |
|----|----|
| `Json` | `:unaltered` |
| `JsonApi` | `:dash` |
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