# SplitHorizontal

*Since: 20201031-154415-9614e117*

Splits the current pane in half horizontally such that the current pane becomes
the left half and the new right half spawns a new command.

```lua
local wezterm = require 'wezterm';

return {
  keys = {
    -- This will create a new split and run your default program inside it
    {key="%", mods="CTRL|SHIFT|ALT",
      action=wezterm.action{SplitHorizontal={domain="CurrentPaneDomain"}}},
  }
}
```

`SplitHorizontal` requires a [SpawnCommand](../SpawnCommand.md) parameter to
specify what should be spawned into the new split.

```lua
local wezterm = require 'wezterm';

return {
  keys = {
    -- This will create a new split and run the `top` program inside it
    {key="%", mods="CTRL|SHIFT|ALT", action=wezterm.action{SplitHorizontal={
      args={"top"}
    }}},
  }
}
```