How to add a role to organization hierarchy?

To add an organization hierarchy- 

• Login to your account. 
• From your profile go to “Admin Setup”. 
• Go to ‘Organization’.
• From the drop-down menu, click on ‘Organization Hierarchy.
• Click on “Add role” in the top right corner. 
• Add the details of the role. 
• Click on ‘Submit’. 
• A new role is created in the organization hierarchy.