- `$env.PROMPT_COMMAND_RIGHT`: A prompt which can appear on the right side of the terminal
- `$env.PROMPT_INDICATOR`: Emacs mode indicator
- `$env.PROMPT_INDICATOR_VI_NORMAL`: Vi-normal mode indicator
- `$env.PROMPT_INDICATOR_VI_INSERT`: Vi-insert mode indicator
- `$env.PROMPT_MULTILINE_INDICATOR`: The multi-line indicator

Each of these variables accepts either:

- A string, in which case the component will be statically displayed as that string.
- A closure (with no parameters), in which case the component will be dynamically displayed based on the closure's code.
- `null`, in which case the component will revert to its internal default value.

::: tip
To disable the right-prompt, for instance, add the following to your startup config:

```nu
$env.PROMPT_COMMAND_RIGHT = ""
# or
$env.PROMPT_COMMAND_RIGHT = {||}
```

:::

#### Transient Prompts

Nushell also supports transient prompts, which allow a different prompt to be shown _after_ a commandline has been executed. This can be useful in several situations:

- When using a multi-line prompt, the transient prompt can be a more condensed version.
- Removing the transient multiline indicator and right-prompt can simplify copying from the terminal.

As with the normal prompt commands above, each transient prompt can accept a (static) string, a (dynamic) closure, or a `null` to use the Nushell internal defaults.

The environment variables which control the transient prompt components are:

- `$env.TRANSIENT_PROMPT_COMMAND`: The prompt itself after the commandline has been executed
- `$env.TRANSIENT_PROMPT_COMMAND_RIGHT`: A prompt which can appear on the right side of the terminal
- `$env.TRANSIENT_PROMPT_INDICATOR`: Emacs mode indicator
- `$env.TRANSIENT_PROMPT_INDICATOR_VI_NORMAL`: Vi-normal mode indicator
- `$env.TRANSIENT_PROMPT_INDICATOR_VI_INSERT`: Vi-insert mode indicator
- `$env.TRANSIENT_PROMPT_MULTILINE_INDICATOR`: The multi-line indicator

::: tip
Nushell sets `TRANSIENT_PROMPT_COMMAND_RIGHT` and `TRANSIENT_PROMPT_MULTILINE_INDICATOR` to an empty string (`""`) so that each disappears after the previous command is entered. This simplifies copying and pasting from the terminal.

To disable this feature and always show those items, set:

```nu
$env.TRANSIENT_PROMPT_COMMAND_RIGHT = null
$env.TRANSIENT_PROMPT_MULTILINE_INDICATOR = null
```

:::

### ENV_CONVERSIONS

Certain variables, such as those containing multiple paths, are often stored as a
colon-separated string in other shells. Nushell can convert these automatically to a
more convenient Nushell list. The ENV_CONVERSIONS variable specifies how environment
variables are:

- converted from a string to a value on Nushell startup (from_string)
- converted from a value back to a string when running external commands (to_string)

`ENV_CONVERSIONS` is a record, where:

- each key is an environment variable to be converted
- each value is another record containing a:
  ```nu
  {
    from_string: <closure>
    to_string: <closure>
  }
  ```

::: tip
As mentioned above, the OS Path variable is automatically converted by Nushell. As a result, it can be treated as a list within your startup config without needing to be present in `ENV_CONVERSIONS`. Other colon-separated paths, like `XDG_DATA_DIRS`, are not automatically converted.
:::

To add an additional conversion, [`merge`](/commands/docs/merge.md) it into the `$env.ENV_CONVERSIONS` record. For example, to add a conversion for the `XDG_DATA_DIRS` variable:

```nu
$env.ENV_CONVERSIONS = $env.ENV_CONVERSIONS | merge {
    "XDG_DATA_DIRS": {
        from_string: {|s| $s | split row (char esep) | path expand --no-symlink }
        to_string: {|v| $v | path expand --no-symlink | str join (char esep) }
    }
}
```

### `LS_COLORS`

As with many `ls`-like utilities, Nushell's directory listings make use of the `LS_COLORS` environment variable for defining styles/colors to apply to certain file types and patterns.

## Nushell Settings in the `$env.config` Record

### Changing Settings in the `$env.config` Record