Projects always have documents. Documents can be attached ot almost any item of the JForce system. You can attach files to comments on a variety of objects. This is where the documents section of a project becomes invaluable. This link provides a quick one stop location where all file are stored. You can quickly access files associated with a project regardless of where they have been attached within the project.

Documents that are not attached directly to a comment but are loaded directly to the document section provide even more options and an advanced view.