If you’re smart enough to be developing in ActionScript, you’re also probably smart enough that you have figured out a way to bookmark the ActionScript Livedocs. However, there always seems to be reason to try access the docs at a time when finding your bookmark is a hassle. For me, that usually happens during peer programming. When I’m working at another person’s machine, they don’t usually have things set up just as I would, and finding an entry point for the current docs can be a little frustrating.
First, if you’re using FlashBuilder (or FlexBuilder), you can always use the ‘Shift + F2′ shortcut. This is mapped to ‘Go To Documentation’ in the ‘ General > Keys’ section of the FB preferences. This opens the Language Reference in the context the Eclipse help viewer.
Since I don’t like having the help viewer clutter the documents, I tend to go straight to a browser and punch in a URL. Fortunately, there is a handy link that automagically resloves to LiveDocs for the current Flex Language Reference.
I don’t know for certain, but AS4LR seems likely once Gumbo is out of beta. For now, the AS3 Docs offer a link to the AS4 docs should you need it.