---
title: "Feature: #100232 - Load additional stylesheets in TYPO3 backend"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:feature-100232-1679344020"
source: "Changelog/12.3/Feature-100232-LoadAdditionalStylesheetsInTYPO3Backend.rst"
typo3-version: "12.3"
typo3-major: 12
type: "feature"
issue: 100232
forge: "https://forge.typo3.org/issues/100232"
tags: ["LocalConfiguration", "ext:backend"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Feature: #100232 - Load additional stylesheets in TYPO3 backend {#feature-100232-1679344020}

See [forge#100232](https://forge.typo3.org/issues/100232)

## Description {#description}

It is now possible to load additional CSS files for the TYPO3
backend interface via regular `$TYPO3_CONF_VARS` settings in a
`settings.php` file of a project (previously known as `LocalConfiguration.php`)
file or in an extension's `ext_localconf.php`.

Previously this was done via the outdated `$TBE_STYLES`
global array which has been deprecated.

## Impact {#impact}

By defining a specific stylesheet, a single CSS file or all CSS files
of a folder, extension authors can now modify the styling via:

**EXT:my_extension/ext_localconf.php**

```php
$GLOBALS['TYPO3_CONF_VARS']['BE']['stylesheets'][my_extension]
    = 'EXT:myextension/Resources/Public/Css/myfile.css';

$GLOBALS['TYPO3_CONF_VARS']['BE']['stylesheets'][my_extension]
    = 'EXT:myextension/Resources/Public/Css/';
```

in their extension's `ext_localconf.php` file.

Site administrators can handle this in their `settings.php` or `additional.php` file.