There are below steps for add Admin right to employee:
1. Navigate to: Control Panel->Setting-Security
2. Newly Page will be Open.
3. Go to Assigned Permissions section in right side.
4. Select the below instruction:
Employee: Select the Particular Employee.
Permission: You can select All or Particular Modules names.
Location: You can Select Particular Location.
Entity: You can select Particular entity.
Business Unit: Select the Particulate Business Unit.
5. Click on "Submit" option for Admint right update for a Particular Employees.