# libtmux._internal.constants.Options.extended_keys

- **Module:** libtmux._internal.constants
- **Package:** libtmux
- **Language:** Python
- **Kind:** attribute
- **Source:** https://github.com/tmux-python/libtmux/blob/38e368c11117fb4aeb2f082d552cd4f210eae06a/src/libtmux/_internal/constants.py#L37
- **Inherited from:** libtmux._internal.constants.ServerOptions
- **Page:** https://libtmux.org/en/py/stable/reference/libtmux-_internal-constants-options-extended_keys/

tmux catalog: [Options](/en/tmux/latest/catalog/options/)

```py
libtmux._internal.constants.Options.extended_keys: t.Literal["on", "off", "always"] | None = field(default=None)
```