In the user interface, there are always settings marked with ENV and locked for selection.
ENV = This value was set by an environment variable.
When starting the software via the shell, various settings can be activated. These settings are called “environment variables” and are marked with ENV. If a variable is activated at startup, it is no longer possible to adjust it in the graphical user interface.
It is not mandatory to set variables. All settings can also be configured via the graphical user interface.