1.After you have reviewed other's code. Click "Code" in the right bottom.
2.Click "Check out with GitHub Desktop"
3.Then we go to GitHub Desktop, now click "Fetch origin".
4.Choose the specific branch. For example, "patch-1"=="#4" which is in "Pull requests" at the page of GitHub.
(Picture of GitHub. "patch-2"=="#5")
5.Click "Open in VD code" ->choose one of the left that you want to edit.