There are two ways of viewing your notes from a Post-Review 1:1 depending on whether you are a manager or the participant in the review cycle.
I am a Manager
To view the notes from a meeting you had with a member of your team as part of a review cycle outcome discussion, first head to Team Reviews from the sidebar and select the review cycle that the 1:1 was linked to.
Then, find the member of your team who you want to view and click the "eye" icon under the actions column for their row.
Once you are viewing the details from this particular review cycle, click on the "Post Review 1:1" tab to view your notes from the meeting. You also have the option to view the full meeting details by clicking the "Go to Meeting" button.
I am a Review Cycle Participant
To view the notes from a meeting you had with your manager as part of a review cycle outcome discussion, first head to My Reviews from the sidebar, then select the Completed Reviews tab.
Select the appropriate review cycle from the list, then when the review details expand, click on the Post-Review 1:1 tab.
On this tab, you will be able to see your notes from the 1:1 that you had with your manager regarding this review cycle.