Within Natural HR, there are different ways which you can update an employee's manager.  

The first, and quickest method is to go to:

Administration -> HR -> Manager Change 

Simply, select the current manager, select the employee(s) which you wish to change, select their new manager from the list and select submit.

A green banner will confirm the successful manager change. 

The second option is to change the manager through the employee file. 

1. Go to:

People -> Employees

 Then, find a particular employee's card. 

2. Select the Change Icon below the employee card.

3. Select the new manager's name from the Manager drop-down list & Select Submit at the bottom of the page. 

Is the manager not appearing in the list? Take a look at our support article to help you resolve this, here.