How to Set a timesheet supervisor ?
Go to Management > Organizational settings > Employees:
mark the the checkbox of the relevant employees to the same manager who will approve their report:
At the bottom of the screen that contains Batch commands, you need to choose the manager/ employee who will approve the employees report, click "update" button to update the data in the system:
If you want to change user type, you should press "edit" at the name of the user, choose manager/employee in the user type and save at the end of the screen.