Pull Request Review Hotkeys

Is there a way to navigate a PR using the keyboard?

Ideally what I’d be able to do is:

  1. Go down line by line using j or k.
  2. Press something (e.g. cmd + enter) to enter a comment on my current line.
  3. Have the ability to highlight part of the line.

I looked through the shortcuts available under the Pull request - Files changed tab section when clicking shift + ? but couldn’t find anything that was support this.