The raw unit file or drop-in override contents. For editable units, changes made here are saved directly to the selected file.
Use this for options that are not exposed by the form. After saving, the system or user systemd manager is reloaded as appropriate so it sees the updated unit definition.
Runtime-managed units, such as transient scope units and generated units, are shown read-only because systemd creates those files dynamically. Use the status, properties, dependencies and log buttons to inspect them.