History
Every value a field has had, and every link, with who and when.
History
The record view's History tab lists each value a field has had, newest first, with when it was saved, and when the record was created, deleted or restored. It also lists the record's links: when one was made, ended or replaced, from either record's side, with the record at the other end.
Who made a change is shown for changes made in the record view, for deletions and restorations, and for links made, ended or replaced in Explorer. Values and links written before that, or by an import, say “not recorded”; the system does not guess. Changes to fields your domain view does not show are not listed.