# 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/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/option_generated.go#L2745
- **Page:** https://libtmux.org/en/go/latest/reference/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].