GNOME System Administration Guide Setup — User and system settings management. User settings Dim screen, allow or disallow online accounts, disable printing… Appearance Change the lock screen shield, default favorite applications, lock the screen when idle… Login Disable the user list, configure a user default session, automatic login… Network & hardware Configure a default server list, default VPN settings… Software GNOME Shell extensions, MIME types, override default applications… Other — Session management and troubleshooting.