Open the file that you want to work with, in the menu that appears select “permissions” (key icon) and decide which user or group of users can access your protected file. You can assign or remove permissions whenever you want, even after having shared your document. (Search by name or email to another user)
If the person you want to send your document to is not yet registered in Prot-On you can type their email in “Search” and invite them to become a Prot-On user.
You can assign read permissions directly from within the Prot-On application. If you want to assign other types of permissions such as print, edit, etc, you can do so from the icon +key.