# libtmux._internal.constants.WindowOptions.copy_mode_line_numbers

- **Module:** libtmux._internal.constants
- **Package:** libtmux
- **Language:** Python
- **Kind:** attribute
- **Source:** https://github.com/tmux-python/libtmux/blob/38e368c11117fb4aeb2f082d552cd4f210eae06a/src/libtmux/_internal/constants.py#L211
- **Page:** https://libtmux.org/en/py/stable/reference/libtmux-_internal-constants-windowoptions-copy_mode_line_numbers/

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

```py
libtmux._internal.constants.WindowOptions.copy_mode_line_numbers: ( t.Literal["off", "default", "absolute", "relative", "hybrid"] | None ) = field(default=None)
```