You can find the Route Settings at Routing → Routes.
A route is a static route that can be defined in the system.
You can Enable or disable a route. It will be automatically added and removed, according to the settings. This will be done on each route check.
You have to define a Destination which is a Network the route is pointing to. You can either have a Gateway or Interface route.
Metric a route can have a metric. You can create multiple routes with the same destination as long as they have different metrics. A metric is like a priority for the route, the lowest metric route is always active in the system.
Source in the Advanced Settings you can choose to set a route source. This might be useful if the firewall itself needs to use the route and it has multiple IPs on the Interface the route is defined on.
Routing Table in the Advanced Settings you can select one or multiple routing tables. Be default, each new route is automatically assigned the Main routing table (ID: 254).
To change the routing tables see the documentation at Routing Tables.
17.1.1. Gateway Route¶
Choose a Gateway that was previously created under Gateway or create a Gateway with the ADD button. The route will use the IP Address in the Gateway as destination. This is usually another Router.
17.1.2. Interface Route¶
Choose an Interface for the route. The route will be defined on that Interface. Please be aware that any Client in the destination network must be in the same L2 Network to be reachable.
To change your BGP setup please go to Routing → BGP and refer to the documentation at BGP.