# tmux.WindowOptionValues.CopyModeLineNumbers

- **Module:** tmux.WindowOptionValues
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/option_generated.go#L2568
- **Page:** https://libtmux.org/reference/go/tmux-windowoptionvalues-copymodelinenumbers/

```
tmux.WindowOptionValues.CopyModeLineNumbers() -> OptionValue[CopyModeLineNumbers]
```

CopyModeLineNumbers returns materialized "copy-mode-line-numbers" as [OptionValue] with value type OptionValue[CopyModeLineNumbers] from window option values; it does not query tmux. Available as CHOICE since tmux 3.7 (choices: "off", "default", "absolute", "relative", "hybrid"); set it with [Window.SetCopyModeLineNumbers] or [GlobalWindowScope.SetCopyModeLineNumbers].