Properties that can be set via UIAppearance are tagged with UI_APPEARANCE_SELECTOR in the corresponding header file. To generate a list of properties tagged with UI_APPEARANCE_SELECTOR, you can use the following unix commands in a terminal: cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/System/Library/Frameworks/UIKit.framework/Headers gr