Jump through changesets and reviews with j/k keyboard shortcuts
We like to ship big things, but sometimes great things come out of tiny features. That’s how I feel about the review navigation shortcuts – with only 2 keys you can jump through all the files, diffs and comments of your changesets and reviews.
Choosing the content to navigate
In Fisheye, the j and k shortcuts automatically cycle through diffs and files; in Crucible reviews, you can fine tune your navigation using the drop down menu next to Prefs to control what items are cycled:

Moving forward / backward in your review
You can easily jump from one content item to another by using keyboard shortcuts j and k. This will work both in Fisheye for your changesets and in Crucible for your reviews.

There are more shortcuts that can be discovered for your reviews. Simply press ? from a review to see the list of the available shortcuts.