Useful GitHub tools for reviewers include diffs (the lower half of the screenshot below), history (the upper half), and blame view (a way to view the evolution of a file commit by commit).

The following screenshot shows an example of a GitHub repository. Typically, you’ll use Git to connect to GitHub, and then use Git to perform tasks such as pushing your code to GitHub ...

GitHub has announced a slew ... which allows users to attach a screenshot, photo, or diagram to a chat, with Copilot generating the interface, code, and alt text to bring it to life.