In Visual Studio I can navigate backwards by pressing "ctrl minus". This is very useful when checking out the definition of a function and then immediately going back to the code I was working on.
How can I do this in Xcode? (I'm using version 3.1.2)
Cheers!
Other than the 'complete shortcut list', I don't know.
You can find previous with G, but that's not really what you were after I think.
There’s a Cmd-Alt-Left that goes back in editor history, and conversely Cmd-Alt-Right that browses forward. (Not sure if this is exactly what you are looking for.) It goes well with Cmd-Alt-Up that switches between the header and the implementation file.
There are small arrows on top left corner of editor pane in Xcode.
Xcode 3.1.x is admittedly a bit weak in this respect. Happily, the navigation @zoul mentions (The back/forward arrows in the header bar, or ⌘⌥← and ⌘⌥→) is significantly improved in Snow Leopard, and should provide the finer-grained navigation you're hoping for. Sorry there's not an immediate solution, but hopefully it helps to know that a fix is coming...