Attaching records to trees is now a reality for both users of Ancestry.com Member Trees and users of FamilySearch Family Tree. (Unfortunately, access to the Family Tree is not yet available to the general public.)
Ancestry.com users have long had the ability to attach records. At its simplest, click on Save and select Attach to the individual. This simple scenario occurs when you start your search in your tree.
Then when you click Save, you can attach directly to the searched-for individual.
FamilySearch only recently added the ability to attach records to the Family Tree. Attaching is a two step process. First save the record to your Source Box as explained in my last article. Second attach the source to a person. To do this, switch to the target Person page, click Add a New Source, and click the Attach next to the target record.