How do I switch between the header and implementation file in Xcode 4?

How do I switch between the header and implementation file in Xcode 4?

In XCode 3 it was cmd and right or left (I think)


Ctrl+Cmd+Up or Down, but the shortcut seems a bit finicky and sometimes stops working, not yet sure when and why.


Be sure to FIRST click ON the actual code window...

that's the critical tip to ensure it works. Click anywhere at all on the actual code. (If you're active in one of the other many panes of Xcode, the keystroke combo has no, or different, meaning(s).)


Also, you can 3 finger swipe up and down on the touchpad if you have one.