Where exactly to configure DNS on NH20A?

[wireless]

I came across a related thread here (https://forum.telus.com/t5/Internet-Home-Phone/Settings-a-DNS-server-with-the-Arcadyan-Boost-2-0-router-White/m-p/140374) but I still am not sure exactly where to put in my custom DNS servers e.g. ones provided by NextDNS.io.

I have entered the following here
https://forum.telus.com/skins/images/7E8FC458CA21DE325DBC303DF562DF9C/responsive_peak/images/image_unmoderated.gif
and
https://forum.telus.com/skins/images/7E8FC458CA21DE325DBC303DF562DF9C/responsive_peak/images/image_unmoderated.gif

but I still see this
https://forum.telus.com/skins/images/7E8FC458CA21DE325DBC303DF562DF9C/responsive_peak/images/image_unmoderated.gif



More... (https://forum.telus.com/t5/Internet-Home-Phone/Where-exactly-to-configure-DNS-on-NH20A/m-p/140510#M34484)