SDK documentation in IntelliJ IDEA

Hello everyone

I have a simple question for your guys, but it's given me a lot of
headaches lately. IntelliJ IDEA has been my IDE of choice since I moved to
Apache Flex at some point last year. But I can't figure a way to make to
SDK documentation work completely, I only get partial documentation.

So my question: what documentation source(s) do you set in your IDE?

Thanks for your help!

Mat