Then give the duplicate copy a different name and save it."
People here rave about how easy Apple programs and devices are to use. Well, not if you learned how to use a Windows based computer and programs first. Saving a document that way would have never occurred to me. "Save as" should allow you to save a document with a different name and the original remain intact. Thanks gardenman, I appreciate your help.
BTW, I'm only a few volunteer hours away from becoming a Master Gardener. I've been gardening for decades and decided this winter to take the course and make it official.