There are two ways of creating a new route for a part, the first (shown here) by clicking the Create Route button in the Part section, and the other by creating the new route in the Route section and then adding the part to the route

Navigate to Data⇒Production⇒Part

Double click on the part number that requires a new route, select the Route tab and then click Create Route

The new route can now be created in the same way as detailed in the Route section

Once the route is created, click Save followed by Close

Highlight the newly created route in the list of routes, add a Material spec and Production Leadtime and then click Save followed by Clear

Click Save