To reject the active process step and return to the previous step:
Execute one of the operations:
In the web application click the 
Reject button on the ribbon.
In the desktop application:
Execute one of the operations:
Click the 
Reject button in the Step group of the Process ribbon tab.
Select the Reject item in the step's context menu in the working area or in the process tree.
After executing one of the operations, the dialog box to confirm step rejection opens:
If required, in the step rejection dialog box:
Select the Selective Subprocesses Rejection checkbox to reject the selected subprocess instances. When the checkbox is deselected, the process step will be rejected to manual step with automatic step subprocess instances.
NOTE. After the Selective Subprocesses Rejection checkbox is selected, the execution method will be changed from automatic to manual.
Enter comment in the Comment box to explain why process step was rejected.
NOTE. The linked object enables the user to reject the step, in which data entry form is used.
See also:
Process Monitoring | Executing Process Steps in Automatic Mode | Executing Process Steps in Manual Mode | Executing Subprocess Steps | Process Stages/Steps Execution Log