Using the blame view you can trace changes to lines in a file and discover how parts of the file evolved over time.

You can view the line-by-line revision history for an entire file with the blame view, or view the revision history of a single line within a file by clicking . Each time you click , you'll see the previous revision information for that line, including who committed the change and when.

Tip: You can also use git blame on the command line to view the revision history of lines within a file. For more information, see Git's git blame documentation.

  1. On GitHub, navigate to the main page of the repository.

  2. Click to open the file whose line history you want to view.

  3. In the upper-right corner of the file view, click Blame to open the blame view. Blame button
  4. To see earlier revisions of a specific line, or reblame, click until you've found the changes you're interested in viewing. Prior blame button

Git Blame Changes list