Authors element allows you to create list of users with author and administrator roles. You can either select all authors and administrator by selecting “All” option from Authors multi-selector or select only few authors from available list.
Option Item Background determines if you want some background for each author in Authors element. If enabled you have available next option Item Background Image which specify if you want to use Custom Background from user’s profile or default theme background. Rest of the settings and Advanced tab serve to layout design or additional information displayed in each item-author of the element.