You can find the Routes Diagnostics at Diagnostics → Routes.
Here you have an overview of all VT AIR routes, divided into internet protocol v4 and v6. A routing table dropdown menu lets you display only the routes assigned to a selected routing table. By default the already existing system routes are listed.
You can see the destination of each route, the interface it’s using and whether it’s using a gateway. The MTU describes the Maximum Transmission Unit which is the size of the largest protocol data unit that can be communicated in a single network transaction. Some routes also have a numeric priority.
To create your own routes please go to Routing → Routes and refer to the documentation at Routes.