how to use this option?

[cluefly]

just as the picture

[Frederic]

This option is available only when IPV6 is present on your computer, and if the ethernet type is IPV6 or IP (which means IPV6 or IPV4).
Then the option is to switch between IPV4 and IPV6 IP address formats.

Frederic

[cluefly]

thanks for your perfect reply,Frederic