# tmux.WindowOptionValues.PaneBaseIndex

- **Module:** tmux.WindowOptionValues
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/option_generated.go#L2684
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-windowoptionvalues-panebaseindex/

```
tmux.WindowOptionValues.PaneBaseIndex() -> OptionValue[int64]
```

PaneBaseIndex returns materialized "pane-base-index" as [OptionValue] with value type OptionValue[int64] from window option values; it does not query tmux. Available as NUMBER since tmux 3.2a; set it with [Window.SetPaneBaseIndex] or [GlobalWindowScope.SetPaneBaseIndex].