You may then wish to set the dwell times in the bottom box for any new stops on the detour.
You can use this action when creating scenarios with planned or unplanned events (e.g. roadworks or accidents) to create detours that allow transit vehicles to avoid a closed turn or section along their route; if you don’t, they will wait indefinitely for the closure to be cleared.
But there’s another use case, which is supported from version 22.0.1: coding changes of transit routes in conjunction with geometry configurations.
If you used geometry configurations, you are familiar with the need to fully recode all transit lines that go through the locations where the network geometry is altered. With the introduction of the transit route change action, you can recode just the portion of the line that goes through each area where the network geometry is changed.