Change IP

I feel like I must be missing something.  My DHCP server assigned an IP Address for myServer, but I'd like to set a static one.  I can change it in the Network Config, but there doesn't appear to be a save or submit button.  After changing it and then rebooting, it doesn't use the changed IP.  What am I missing?

I ended up changing the IP through my router/DHCP server.  It fixed the problem.