Once you have completed the shelve operation, you can then select a shelveset to add it to a review.
To add a shelveset to a new review:
Go to the Code Review Board.
Click Start New Review.
Assign the moderator, the code author, reviewer(s), and optionally watcher(s)..
Click Add revisions.
Select the Shelvesets check box. The dialog window will display all the shelvesets only.
Select a required shelveset(s) and click OK. The selected shelveset(s) will be added to a new review.