DNS Server?

Hello. My wireless modem was replaced today with an Arris TG1682G. I forgot the old model, but it was also an Arris. On that old router, I had it disabled as a DHCP server and changed the DNS server to my Pi-hole. I've been up and down the settings for my new router, but am unable to find those settings (I see an option to disable IPv6 DHCP server, but not IPv4).

I've talked to multiple agents that didn't seem to understand what I was asking and offering random advice to restart my router, etc. Can someone just tell me where on the Arris TG1682G settings I can change my DNS server. Disabling DHCP server would be cool too.