This is a very quick lesson on how to change a staff members permissions.
Click settings
Click Staff
Click edit on the staff member that you would like the change.
Select the appropriate role for the staff member.
Click Save Changes
That's it, your staff members permissions have now been changed.
For information on selecting the correct role for your staff member, take a look at this article - http://support.servicem8.com/entries/22741772-security-roles-overview