In the Properties pane, select View Security Details to view the Security Details page. The Default Security drop-down menu enables you to choose between Public, Private, and View. This setting applies to all users unless otherwise specified.
Select Add Users/Groups to search for users and grant them security access other than the specified default. To add new users/groups, search for them, select the name, and then select Confirm when prompted. The list of users added appears below this option. The drop-down menu next to each name allows you to choose between Full Access, Read Only, Read/Write, No Access, and Remove.