How do you increase your IP Address pool for static IP addresses?

I have an address pool from 192.168.200.1 to 192.168.200.250, the entire pool is being used by DCHP. How do I increase my address pool, so that I can assign static IP addresses for printers etc?
Say: 192.168.200.251
But not allow DCHP to use it?
I will assign the static IP address using DNS.
I hope that makes sense?
Thanks

Please re-read responses in your earlier thread for some related background on this question.
If your DHCP address pool is from .1 to .250 inclusive, then you have four addresses left for static hosts in the typical /24 subnet.  You have .251. .252, .253 and .254 available.  One of those addresses will probably be your gateway router, and one will be your server host. 
You don't need to do anything to the DHCP pool to use those four addresses, because the static addresses are inherently outside of the DHCP pool.
DHCP address pools are not the same thing as the IP subnet address block, and DHCP-assigned addresses do not control what (other) IP hosts and addresses that a DHCP-addressed host can connect to. 
DHCP servers do provide local and usually somewhat transient clients access to a pool of shared IP addresses, and they provide clients with information on the local network including the gateway router address, the subnet mask, and the DNS server address(s).
And in general, do you really have 200+ dynamic-addressed hosts in your network?   If you do have 200-some transient hosts, then you're headed for either a bigger netblock (eg: a /22 configuration), or you're headed toward configuring multiple submets and routing among the various subnets.
The /24 configuration is another and shorter nomenclature for the subnet mask 255.255.255.0 that's common.

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