1. On the Files home page, open the actions menu of the file you want to change and selectEdit File Details.
2. From the File Privacy on Records list, select an option for controlling the files visibility when it’s attached to a record.Visible to Anyone With Record Access lets anyone who can see the record also see this file attachment on the record’s Related tab, under Files.Private on Records lets only the file owner see the file on the record’s Related tab, under Files.
3. Visible to Anyone With Record Access lets anyone who can see the record also see this file attachment on the record’s Related tab, under Files.
4. Private on Records lets only the file owner see the file on the record’s Related tab, under Files.
5. Click Save.