I have DID 4519 pointing to route 254, I need to change it to a different route.

I know where to add or remove extensions to a route but I need to use a new route for this DID. The manual really isn't clear.

Changing route destination (ringing) is flash 43, changing the route the did number is assigned to is flash 44. Flash 44 is also where you enter any new did and name it if that is wanted.