Is there a 'show documentation for selection' option in Xcode?

In Emac's racket-mode I can put point on a variable / function / class / etc, give it a quick C-c C-d and it pops up my web browser with the documentation for the thing I had selected. Is there anything equivalent in XCode? I've looked through the menus and the documentation and not found anything, so I'm hoping I'm just being blind.

You can Option-click the symbol or use the Quick Help inspector (View > Inspectors > Quick Help) to open documentation for your current selection.

Perfect. Thanks, Kyle.