System settings: Module Admin Tools > Settings

Global configuration can only be changed by backend users with System Maintainer privileges.

Use the backend module Admin Tools > Settings to access the different configuration options:

Backend module "Admin Tools > Settings" as seen by a system maintainer

Changes made in this module are written to file config/system/settings.php. They can be overridden by configuration in file config/system/additional.php in which case they cannot be changed from the TYPO3 Backend.