We tried to make OpenKM as intuitive as possible, but an advice is always welcome.
Forum rules: Please, before asking something see the documentation wiki or use the search feature of the forum. And remember we don't have a crystal ball or mental readers, so if you post about an issue tell us which OpenKM are you using and also the browser and operating system version. For more info read How to Report Bugs Effectively.
Not possible, if it'll be possible then will have a security hole, because some information ( text ) will be available under indexer ... and nothing must be available. In this scenario you might use metadata, categories etc... to find documents, but must forget about contents.