Nominating yourself to review a peer.
If an admin has allowed peers to self-nominate, employees will be able to select themselves as a peer reviewer for another during the peer selection phase of your Review Cycle. To do so, follow the below steps:
Nominating Yourself as a Peer Reviewer
You can access your review cycle in two ways, either through a task in your Home page, or through your People page.
From the Home page:
Step 1: Click the Select peer reviewers task from your Home page.
From the People Page:
Step 1: Navigate to your People page in the Discovery Navigation.
Step 2: Select your name at the top of the People navigation, and then Reviews in your toolkit.
Step 3: Select Select peers for yourself beside the appropriate review cycle.
Once you access your review, you'll have the ability to both nominate peers to review you, as well as opt-in to review one of your peers.

Once you submit your nominations, your manager will be able to either approve or reject your submission. Note that for self-nominations to review others (like Fletcher above), their manager will approve or reject your nomination.
Note: You will only be able to nominate yourself to review peers if you are being reviewed in the review cycle.