You need to select the folder Additional Documents displayed in the main frame or in the tree in the left frame.
Documents or reports on NQA are created from a template pool. The template pool is managed by the administrator who through the template pool controls the documentation standards used by the teams. So its rather the NQA policy to enforce the use of templates and if users produced materials not following the templates they should publish their materials in Additional Documents and link them to the official documents.
Additional documents can of course be of any type.
What do you want to do?