I force most of my devices to use my pi hole as a DNS server, short of setting it as the DNS used by the router, I was wondering if that option also affected the DNS filter under LAN the one Merlin implemented, it has a global option to force devices to use a specific DNS server, I was wondering if the option to forward queries to upstream DNS affected it also.I'm not sure what you mean by "global DNS and router DNS" as they are two different things. But the option to forward local queries is just something that can be turned on or off in dnsmasq. Therefore it's only meaningful for queries sent to the router's own DNS server.
Welcome To SNBForums
SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.
If you'd like to post a question, simply register and have at it!
While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!