# tmux.WindowOptionValues.PopupBorderLines

- **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#L2740
- **Page:** https://libtmux.org/reference/go/tmux-windowoptionvalues-popupborderlines/

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

PopupBorderLines returns materialized "popup-border-lines" as [OptionValue] with value type OptionValue[PopupBorderLines] from window option values; it does not query tmux. Available as CHOICE since tmux 3.3 (choices: "single", "double", "heavy", "simple", "rounded", "padded", "none"); set it with [Window.SetPopupBorderLines] or [GlobalWindowScope.SetPopupBorderLines].