Hi there, and welcome to the forum.
In order for us to give you the best advice in the future, I would suggest you add a link to your airline (forum code) and your DOC.
To answer your question, the feature you are looking for is called hotswap. It has not yet been released to the public, as there are still many major bugs in it. You can still save searching for the airport pairs if you close the routes one at a time. Then you are presented with an option to recreate the exact same route.
I hope this helped, and feel free to ask other questions!
