Create project plan scenarios

As a user, I would like to be able to run different project plan scenarios. Currently, to see how changes to tasks, deliverables, and milestones impact the timeline, I need to manually adjust start and end dates and revert back the original when finished. I would like to run "scenarios" of the project plan so that I can share them with the client to show how changes impact the overall timeline. A way to do this may implementing version control or creating copies of the root file.