# io.github.libtmux.kotlin.Window.split

- **Module:** io.github.libtmux.kotlin
- **Package:** io.github.libtmux:libtmux-kotlin
- **Language:** Kotlin
- **Kind:** method
- **Source:** https://libtmux.org/en/kotlin/latest/reference/sources/libtmux-kotlin/build/generated/sources/operations/kotlin/io/github/libtmux/kotlin/WindowOperations.kt
- **Page:** https://libtmux.org/en/kotlin/latest/reference/io-github-libtmux-kotlin-window-split/

tmux command: [`split-window`](/en/tmux/latest/manual/split-window/)

```
public suspend fun Window.split(): Pane

public suspend fun Window.split(spec: SplitSpec): Pane
```

Splits this window's active pane in half, putting the new one below it.

## Parameters

- `spec` (`SplitSpec`) (for `split(spec)`)