Can you provide more insight on this fusion scenario? I have never seen or used this feature before neither has my team. 

Right! But I mean more for an individual change made. Otherwise, you have to remember to switch modes each time you make a change. Or there should be a history that says date changed from x date to x date 

Is there any plan to add an undo feature on a timeline? Something to keep track of your changes and that it won't effect the entire timelines and dates?