It is not always easy to find the right document as teTEX/TeX Live ships with a huge number of help documents. In order to facilitate this process, teTEX/TeX Live provides a tiny program called texdoctk. It provides a database of all the help documents, for which Kile offers a user-friendly interface.
All the documents are grouped into categories. Additionally, one can search for package names or keywords. Kile will then show only the help documents matching the search string.
A mouse double-click or the Space key will start a viewer for the selected document. This can be an arbitrary document, not only a DVI, PS, PDF or HTML document. Kile takes the KDE settings into account in order to start an appropriate viewer.