Qt help is missing in qtcreator 2.7.0. How to add it?

[TorAn]

When "F1" is pressed I am getting "documentation is not available" message. Help shows only qtcreator-related help. How can I add Qt help in qt creator 2.7.0?

Thanks.

[TorAn]

Solved. The reason, most likely, is due to the fact that I use Qt build from sources and did not build qt documentation. For anybody facing the same problem here is what I did to enable help in qtcreator:
1. Find out if <base qt directory>/qtbase/docs have *.qch help files. These are compiled help files for various qt parts
2. If there are none, then all help system is absent and you have to build it.
3. optionally read qtbase/doc/README
4. switch to qtbase and run make docs or nmake docs.
5. ensure that *.qch files are now in qtbase/docs
6. If you still cannot get help in qtcreator - go to tools/options/help, switch to documentation and manually add all qch files.