Maybe this has happened to you, in a large or small scale: You captured some cool A/V from an event. (Small scale, maybe it’s your niece’s high school graduation; large scale, maybe it’s a segment for a movie.) It’s time now to edit it. You have lots of ideas, and editing tools. You’ve been burned before by not saving changes as you go along, and you know the importance of saving a separate incidence of each major technique you apply.