Reviewing changed files in a pull request
In the repository's right sidebar, click Pull requests.
In the list of pull requests, click the pull request you'd like to review.
On the pull request, click Files changed.
Reviewing commits in a pull request
In the repository's right sidebar, click Pull requests.
In the list of pull requests, click the pull request you'd like to review.
On the pull request, click Commits.
Tip: You can open and navigate the dropdown lists of commits and changed files in a pull request with keyboard shortcuts. For more information, see "Using keyboard shortcuts."