CMS Site Manager > Development > Workflows > Steps tab:
On this tab, you can manage the cases and choices in decision steps.
To add a new case, click New case.
The list of cases enables you to edit () and delete () cases. You can also rearrange the cases by moving them up () and down ().
Help URL: http://devnet.kentico.com/docs/7_0/contexthelp/index.html?workflow_step_cases.htm