How do you pre-create a DHCP reservation?

Question

I want to pre-create a DHCP reservation before the host is connected to the network. However, that does not seem to be an option when adding a new network definition: 
 
 I currently clone an existing reservation and then edit it which is an extremely clunky way to admin. 
 Thoughts? 
 John

Ol Deda · Accepted Answer

Expand all the options when creating a host. 
 There you have DHCP Option with desired DHCP and the option to add mac address