adding route to pfsense

Hi.. I have a simple route that I need to add to my (first) pfSense firewall and cannot figure it out (tried many times and failed).  Here is the static route:  Destination 172.16.0.0,  SN 255.255.0.0  Gateway 172.16.0.254 (next hop)  Metric 1.  That's it!  Any help?  Thanks in advance.  (this is to direct traffic to our Cisco Switch (Layer 3).  - Bill