Before you kick off your first 360° or performance assessment, you should decide on a scale for your structured questions. The default setting is a 5-point scale but you can also choose a 2, 3 or 4 point scale. This scale will be applied to all structured questions used in any future assessment.
To change the scale (or its labels), go to "Settings" > "Admin Settings", select "Account Settings" and scroll down to "Performance Assessments: Scale". As you can see on the screenshot below, you can customize both the scale and its labels.