# tmux_pane:split_options/0

- **Package:** libtmux_erlang
- **Language:** Erlang
- **Kind:** typealias
- **Source:** https://github.com/libtmux/libtmux-erlang/blob/d1b6308440cf9eb8f6647e7ae434bce60e849368/apps/libtmux_erlang/src/tmux_pane.erl#L80
- **Page:** https://libtmux.org/en/erlang/latest/reference/t-tmux_pane-split_options-0/

```
-type split_options() ::
          #{direction => horizontal | vertical,
            size =>
                {cells, 1..2147483647} | {percent, 1..100},
            before => boolean(),
            full_size => boolean(),
            zoom => boolean(),
            cwd => binary(),
            env => #{binary() => binary()},
            launch => tmux_command:launch_spec(),
            detach => boolean()}.
```

Split geometry, placement and explicit launch options. Defaults to a detached vertical split.