Disable DHCP on LAN GL-AR300M

Looked around but cannot find any way to do this. I want to use this just as an Access Point. How can I disable DHCP on the LAN and just use it as an AP if need be for an existing network?

In the UI, configure the switch button to change from router to bridge mode. The move the switch to the right side.

But will the device communicate on the same lan or will it NAT?

It will not NAT in bridge mode.