This ought ot be a simple task, but I've taken over the administration of an existing network, so I may just be too inexperienced with this router.

I need to set up a DHCP server on a separate Linux system on the network to take over from the one on the router, so I need to disable the router's DHCP service. I have found this article: https://www.tp-link.com/uk/support/faq/3155/ - however, it doesn't match what I can find in the web-interface. In fact, I can't find any mention of DHCP anywhere, so that would be my question: how do I disable the router's DHCP server?