The History view lets you see how a file has evolved since it was created and who has contributed to it.
To open the History view, navigate to the File view and click the History button:
This view displays the list of revisions that have affected the file.
The Annotate view displays line-level references to contributors and revisions that have recently affected specific lines of code in a file.
To open the Annotate view, navigate to the File view and click the Annotate button.
Each reference associated with a specific change contains a revision ID with a link, its author, and a date it took place.