Administrator Help missing key information: Advanced settings -> Remote IP assignment

URL: https://docs.sophos.com/nsg/sophos-firewall/18.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Network/Interfaces/NetworkAddREDInterface/index.html#add-an-interface-for-a-firewall-red

Section: 

Add an interface for a RED hardware model

Missing: Advanced settings -> Remote IP assignment is missing any description about what this setting is for and what the three options mean.