I frequently need to slide tasks and projects around on the timeline to see how moving them will affect other projects on the schedule. Frequently, though, I need to undo one move (or several) and put things back "the way they were." Other PM software I've used has a save button on the timeline, and it's immensely helpful. I hope you'll be able to add this critically important feature.
Marketing Project Manager
Larry Phung "This is your life and it's ending, one minute at a time."