# Setting: `app_ui_pack_default`

- **Constant:** `ConfigInterface::APP_UI_PACK_DEFAULT`
- **Category:** `app`
- **Type:** `text`
- **Required:** no
- **Sensitive:** no
- **Validation:** `nullable|string|max:255`
- **Placeholder / default hint:** `—`

## Description

Active UI pack id for layout takeovers (empty = none, or pluginId:packId)

## Allowed options

_Free-form / no fixed options_

## Change via CLI

```bash
featherpanel saas getsetting app_ui_pack_default
featherpanel saas setsetting app_ui_pack_default "<value>"
```

## Change via API

```http
PATCH /api/admin/settings
Content-Type: application/json

{ "app_ui_pack_default": "<value>" }
```