When I go to my Grandfather in Family Tree Maker I see a hint (leaf). Clicking on the leaf opens a public GEDCOM that I want to merge into my file. It happens to be the Dartnell-Delahoyde Tree GEDCOM. I want to merge from my grandfather in the Dartnell-Delahoyde Tree GEDCOM all of the folks in the file. Can this be done? Can it be done without duplicating everyone?