To reject finished process step and come back to the previous step:
In the web application click the 
Reject button on the toolbar.
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 Reject dialog box:
Select the Selective Subprocesses Rejection checkbox to change automatic execution of the Subprocess Call step to manual execution. When changing the step execution method, it will be available to select subprocesses for restart in manual mode. When the checkbox is deselected, the process step will be rejected to manual step with automatic step subprocesses.
Enter comment in the Comment box to explain why process step was rejected.
Click the Reject button.
After executing the operations, the step will be 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