This page lists the chapters on the left and the authors on the right. You can select the chapters, select the author and click on “>” to assign. The green circle on the chapter list indicates that the chapters are assigned. The checkbox is for selection, and in the event an author is already assigned for the chapter, all the chapters previously assigned to the author are displayed.
Once you have made the changes, you can either choose to save or send an invite. Please note that if you have not saved or sent an invite, the changes made will not take effect. On clicking the “INVITE” button, mails will be triggered to the respective authors.