Restricting a specific user/role from viewing the list of pa

Using Sitefinity 5.0, how do you restrict a specific user/role from viewing the list of pages in the dashboard of the site that they do not have permissions to edit?  We would like to set up a 'sandbox' section in our site that this specific user can go in and make edits to only certain pages.  While they do not have the ability to edit other pages in the site, we want to set the permissions so they cannot view these pages when they are in the pages section of the dashboard.  Please let me know if more information is needed. 
Thank you,
Eileen