Have you ever had a document that you wanted to post online, but you did not want other Google users to have the option to Make a Copy or download it? This is a request I have heard a lot from users and Google now has an answer to it! They have added new features to Google Docs which you access by clicking the Share button and then Advanced near the lower right hand screen of the Sharing window.
You have two boxes to check. The first choice allows you to prevent editors on the document from changing access and adding more people. This gives you as the owner total control over who has access to the document. The second choice allows you to prevent others from downloading, printing and copying the document if they only have commenting or viewing rights. Users cannot even copy the text from the document. This comes in very handy if you want to retain ownership and control of the content.