The Back Office interface is produced by the
Additionally, it uses React-based modules that make each part of the UI extensible, and Bootstrap for styling.
The interface is accessible in your browser at
To extend the Back Office with PHP code, you can use events, either built-in Symfony events or events dispatched by the application.
Some extensibility, such as adding custom tags, is possible without writing your own code, with configuration and templating only.
Refer to Custom string translations to learn how to provide string translations when extending the Back Office.