For sharing documents privately, please do the following:

1. Select the document from 'Personal folders' and click on the "Share" link present in the toolbar menu.
2. A dialog box with heading "Share Document" appears on the screen.
3. Select 'Private Share' tab and enter Zoho id/Email address of the recipient you want to share.
4. Specify the access permission (Viewer/Collaborator/Co-Owner) for the shared document & click on the "Share" button.
5. An email with the subject "Document Shared to You on Zoho Docs" will be sent to the recipient.