Adding aliases to RED interface

Hello.
I’m trying to find a way to add an aliases to RED interface. Unfortunately information in wiki (https://wiki.ipfire.org/configuration/network/aliases) seems to be outdated: there are no “Aliases” menu item in “Network” tab…
How could I add aliases then?

The wiki is not outdated!

“First, use the setup program on the console to configure your Red interface with a static IP address if …”

This option is only enabled if red is configured “static”.

Oh, I see, sorry. Thanks a lot!