There will inevitably be times during your research when you suspect or realize you have (for example) two records for the same individual. Perhaps you created one in error, perhaps you believed there were two separate individuals but now have evidence that they are the same person. Or maybe you have two records that look similar and you want to compare them to check if you have a duplicate individual. And you may find you haven’t only duplicated a single individual but also for example their spouse and children.
Whatever the cause, you will want to use the Merge/Compare dialog to disentangle matters. Remember to take a backup first, so that if things go wrong you can start again. And read the Help file thoroughly before you start, especially Basic Record Merging and Branch Merging and Features of the Merge/Compare Dialog because it takes strict attention to detail to get a merge correct.
Tip: One common mistake people make is only to merge the individual recordsEvery person in your tree will have a single Individual Record, which holds all the information about that individual that you have entered. You can view and edit Individual records in the Property Box Dialogue. and not check/merge the linked records such as families, mediaWhen you add a picture, video, sound recording, document file etc into a Family Historian project, a Media record is created to represent that media item within the project; the Media record includes a link to the actual Media file., sourcesSource: "where information was found". This could be anything from an archive in a county records office, a book, or even a relative's recorded recollection. Citing your Sources helps to show how you reached a particular conclusion about an Individual.. If, for example, you merge individuals without merging their families and the individuals in those families, you will end up with a tangle of duplicates that will be hard to unravel.