AppStore submission - how to duplicate the release configuration?

I'm in the throes of attempting to submit an app via XCode 4. I've just noticed, per this url from Apple :

http://tinyurl.com/3ol2qoj

that to prepare an app for submission to the app store in XCode 4, you must:

1. In your project, duplicate the Release build conf开发者_JS百科iguration and name the duplicate “AppStore”.
2. Set the Code Signing Identity build setting to your team’s distribution code signing identity through the application’s distribution provisioning profile for the AppStore build configuration.

The page shows an image (which I'd post if I knew how) which has the project highlighted (not the targets). The BuildSettings, Code Signing Identity for the project shows an AppStore entry above the Debug and Release entries.

My questions is, what is the method for duplicating that release entry?

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You need to go to the Info tab located in the Project settings (not the target apps). You'll see a list of configurations there (Debug, Release). Click on the + at the bottom and then Duplicate "Release" Configuration