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, 4, 6 or 7-point scale or even a continuous 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" and click on "Reviews" on the left hand side. As you can see on the screenshot below, you can customize both the scale and its labels.
If you want to use the new scale for all existing templates check the respective box before you click on "Update review scale".
If you would like to change the default review scale for a specific template or (draft) cycle only you can do that in the template/cycle setup under 'Questions' by clicking on 'Edit the default scale' at the bottom of the page.
It's also possible to use different scales for different questions within a review and you can even set up multiple choice questions in a review (read here for details).