点击返回按钮，然后选择其它的主题。

Click the back button and then select the other Theme.

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它要求在第一个屏幕时按下返回按钮退出应用程序。

This requires that the back button exits the application if on the first screen.

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显然，一些应用程序忽略了第二部分，任何时候按下返回按钮都退出应用程序。

Apparently some applications are ignoring the second part and just exiting the application no matter when the back button is pressed.

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