iPhone4 Simulator in XCode 4.0.2

Sorry, this is going to be a dumb question.

How do I run my app on iPhone4 simulator using Xcode 4.0.2? (I want to test the hi开发者_运维技巧gh-resolution image issues).

My drop-down doesn't seem to include this device: http://cl.ly/9dya

And Mr Google doesn't seem to be coughing up the usual.

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When you open the iOS Simulator, on the Menu Bar under Hardware -> Device there should be an option for iPhone (Retina) which will show the Retina Device Simulator

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The retina-/iPhone 4 screen is a setting in the simulator itself.