One driver, one day, in the order stops actually happen. Past stops are a read-only log; upcoming stops can be cancelled, reallocated, or dragged (⋮⋮ handle) to reorder within the day. Reallocating an order moves both legs together unless one leg is already done, in which case only the remaining leg moves. Drag a card from "Pull in a stop" straight into the timeline to reallocate it the same way.
Unallocated orders and other drivers' not-yet-done legs. Drag a card into the timeline to reallocate it here — its paired leg follows automatically unless it's already done.