Access Code: By default it's generated randomly， if you want to change it to specified code, please click it and type new code. If you leave it blank, it use random code again.
Allow File Transfer: If this option was selected，the controller can use File Transfer and Management tool, or the file transfer tool can't be used. Note：Even you disabled this option，the controller still may use other third-party tool to transfer your files.
Allow Multi-controllers: In fact on matter if this is selected，the computer can be controlled by multi-users. The difference is: If this option is not selected，later connected controllers can't see the whole screen until the screen is refreshed. We don't recommend to select this option as it affects the performance.